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Tag: Boston University School of Public Health

  • Whatever Happened to Carpal Tunnel Syndrome?

    Whatever Happened to Carpal Tunnel Syndrome?

    Diana Henriques was first stricken in late 1996. A business reporter for The New York Times, she was in the midst of a punishing effort to bring a reporting project to fruition. Then one morning she awoke to find herself incapable of pinching her contact lens between her thumb and forefinger.

    Henriques’s hands were soon cursed with numbness, frailty, and a gnawing ache she found similar to menstrual cramps. These maladies destroyed her ability to type—the lifeblood of her profession—without experiencing debilitating pain.

    “It was terrifying,” she recalls.

    Henriques would join the legions of Americans considered to have a repetitive strain injury (RSI), which from the late 1980s through the 1990s seized the popular imagination as the plague of the modern American workplace. Characterized at the time as a source of sudden, widespread suffering and disability, the RSI crisis reportedly began in slaughterhouses, auto plants, and other venues for repetitive manual labor, before spreading to work environments where people hammered keyboards and clicked computer mice. Pain in the shoulders, neck, arms, and hands, office drones would learn, was the collateral damage of the desktop-computer revolution. As Representative Tom Lantos of California put it at a congressional hearing in 1989, these were symptoms of what could be “the industrial disease of the information age.”

    By 1993, the Bureau of Labor Statistics was reporting that the number of RSI cases had increased more than tenfold over the previous decade. Henriques believed her workplace injury might have had a more specific diagnosis, though: carpal tunnel syndrome. Characterized by pain, tingling, and numbness that results from nerve compression at the wrist, this was just one of many conditions (including tendonitis and tennis elbow) that were included in the government’s tally, but it came to stand in for the larger threat. Everyone who worked in front of a monitor was suddenly at risk, it seemed, of coming down with carpal tunnel. “There was this ghost of a destroyed career wandering through the newsroom,” Henriques told me. “You never knew whose shoulder was going to feel the dead hand next.”

    But the epidemic waned in the years that followed. The number of workplace-related RSIs recorded per year had already started on a long decline, and in the early 2000s, news reports on the modern plague all but disappeared. Two decades later, professionals are ensconced more deeply in the trappings of the information age than they’ve ever been before, and post-COVID, computer use has spread from offices to living rooms and kitchens. Yet if this work is causing widespread injury, the evidence remains obscure. The whole carpal tunnel crisis, and the millions it affected, now reads like a strange and temporary problem of the ancient past.

    So what happened? Was the plague defeated by an ergonomic revolution, with white-collar workers’ bodies saved by thinner, light-touch keyboards, adjustable-height desks and monitors, and Aeron chairs? Or could it be that the office-dweller spike in RSIs was never quite as bad as it seemed, and that the hype around the numbers might have even served to make a modest problem worse, by spreading fear and faulty diagnoses?

    Or maybe there’s another, more disturbing possibility. What if the scourge of RSIs receded, but only for a time? Could these injuries have resurged in the age of home-office work, at a time when their prevalence might be concealed in part by indifference and neglect? If that’s the case—if a real and pervasive epidemic that once dominated headlines never really went away—then the central story of this crisis has less to do with occupational health than with how we come to understand it. It’s a story of how statistics and reality twist around and change each other’s shape. At times they even separate.

    The workplace epidemic was visible only after specific actions by government agencies, employers, and others set the stage for its illumination. This happened first in settings far removed from office life. In response to labor groups’ complaints, the Occupational Safety and Health Administration began to look for evidence of RSIs within the strike-prone meatpacking industry—and found that they were rampant.

    Surveillance efforts spread from there, and so did the known scope of the problem. By 1988, OSHA had proposed multimillion-dollar fines against large auto manufacturers and meatpacking plants for underreporting employees’ RSIs; other businesses, perhaps spooked by the enforcement, started documenting such injuries more assiduously. Newspaper reporters (and their unions) took up the story, too, noting that similar maladies could now be produced by endless hours spent typing at the by-then ubiquitous computer keyboard. In that way, what had started playing out in government enforcement actions and statistics morphed into a full-blown news event. The white-collar carpal tunnel crisis had arrived.

    In the late 1980s, David Rempel, an expert in occupational medicine and ergonomics at UC San Francisco, conducted an investigation on behalf of California’s OSHA in the newsroom of The Fresno Bee. Its union had complained that more than a quarter of the paper’s staff was afflicted with RSIs, and Rempel was there to find out what was wrong.

    The problem, he discovered, was that employees had been given new, poorly designed computer workstations, and were suddenly compelled to spend a lot of time in front of them. In the citation that he wrote up for the state, Rempel ordered the Bee to install adjustable office furniture and provide workers with hourly breaks from their consoles.

    A computer workstation at The Fresno Bee in 1989 (Courtesy of David Rempel)

    Similar injury clusters were occurring at many other publications, too, and reporters cranked out stories on the chronic pain within their ranks. More than 200 editorial employees of the Los Angeles Times sought medical help for RSIs over a four-year stretch, according to a 1989 article in that newspaper. In 1990, The New York Times published a major RSI story—“Hazards at the Keyboard: A Special Report”—on its front page; in 1992, Time magazine ran a major story claiming that professionals were being “Crippled by Computers.”

    But ergonomics researchers like Rempel would later form some doubts about the nature of this epidemic. Research showed that people whose work involves repetitive and forceful hand exertions for long periods are more prone to developing carpal tunnel syndrome, Rempel told me—but that association is not as strong for computer-based jobs. “If there is an elevated risk to white-collar workers, it’s not large,” he said.

    Computer use is clearly linked to RSIs in general, however. A 2019 meta-analysis in Occupational & Environmental Medicine found an increased risk of musculoskeletal symptoms with more screen work (though it does acknowledge that the evidence is “heterogeneous” and doesn’t account for screen use after 2005). Ergonomics experts and occupational-health specialists told me they are certain that many journalists and other professionals did sustain serious RSIs while using 1980s-to-mid-’90s computer workstations, with their fixed desks and chunky keyboards. But the total number of such injuries may have been distorted at the time, and many computer-related “carpal tunnel” cases in particular were spurious, with misdiagnoses caused in part by an unreliable but widely used nerve-conduction test. “It seems pretty clear that there wasn’t a sudden explosion of carpal tunnel cases when the reported numbers started to go up,” Leslie Boden, an environmental-health professor at the Boston University School of Public Health, told me.

    Such mistakes were probably driven by the “crippled by computers” narrative. White-collar workers with hand pain and numbness might have naturally presumed they had carpal tunnel, thanks to news reports and the chatter at the water cooler; then, as they told their colleagues—and reporters—about their disabilities, they helped fuel a false-diagnosis feedback loop.

    It’s possible that well-intentioned shifts in workplace culture further exaggerated the scale of the epidemic. According to Fredric Gerr, a professor emeritus of occupational and environmental health at the University of Iowa, white-collar employees were encouraged during the 1990s to report even minor aches and pains, so they could be diagnosed—and treated—earlier. But Gerr told me that such awareness-raising efforts may have backfired, causing workers to view those minor aches as harbingers of a disabling, chronic disease. Clinicians and ergonomists, too, he said, began to lump any pain-addled worker into the same bin, regardless of their symptoms’ severity—a practice that may have artificially inflated the reported rates of RSIs and caused unnecessary anxiety.

    Henriques, whose symptoms were consistent and severe, underwent a nerve-conduction test not long after her pain and disability began; the result was inconclusive. She continues to believe that she came down with carpal tunnel syndrome as opposed to another form of RSI, but chose not to receive surgery given the diagnostic uncertainty. New York Times reporters with RSIs were not at risk of getting fired, as she saw it, but of ending up in different roles. She didn’t want that for herself, so she adapted to her physical limitations, mastering the voice-to-text software that she has since used to dictate four books. The most recent came out in September.

    As it happens, a very similar story had played out on the other side of the world more than a decade earlier.

    Reporters in Australia began sounding the alarm about the booming rates of RSIs among computer users in 1983, right at the advent of the computer revolution. Some academic observers dismissed the epidemic as the product of a mass hysteria. Other experts figured that Australian offices might be more damaging to people’s bodies than those in other nations, with some colorfully dubbing the symptoms “kangaroo paw.” Andrew Hopkins, a sociologist at the Australian National University, backed a third hypothesis: that his nation’s institutions had merely facilitated acknowledgement—or stopped suppressing evidence—of what was a genuine and widespread crisis.

    “It is well known to sociologists that statistics often tell us more about collection procedures than they do about the phenomenon they are supposed to reflect,” Hopkins wrote in a 1990 paper that compared the raging RSI epidemic in Australia to the relative quiet in the United States. He doubted that any meaningful differences in work conditions between the two nations could explain the staggered timing of the outbreaks. Rather, he suspected that different worker-compensation systems made ongoing epidemics more visible, or less, to public-health authorities. In Australia, the approach was far more labor-friendly on the whole, with fewer administrative hurdles for claimants to overcome, and better payouts to those who were successful. Provided with this greater incentive to report their RSIs, Hopkins argued, Australian workers began doing so in greater numbers than before.

    Then conditions changed. In 1987, Australia’s High Court decided a landmark worker-compensation case involving an RSI in favor of the employer. By the late 1980s, the government had discontinued its quarterly surveillance report of such cases, and worker-comp systems became more hostile to them, Hopkins said. With fewer workers speaking out about their chronic ailments, and Australian journalists bereft of data to illustrate the problem’s scope, a continuing pain crisis might very well have been pushed into the shadows.

    Now it was the United States’ turn. Here, too, attention to a workplace-injury epidemic swelled in response to institutional behaviors and incentives. And then here, too, that attention ebbed for multiple reasons. Improvements in workplace ergonomics and computer design may indeed have lessened the actual injury rate among desk workers during the 1990s. At the same time, the growing availability of high-quality scanners reduced the need for injury-prone data-entry typists, and improved diagnostic practices by physicians reduced the rate of false carpal tunnel diagnoses. In the blue-collar sector, tapering union membership and the expansion of the immigrant workforce may have pushed down the national number of recorded injuries, by making employees less inclined to file complaints and advocate for their own well-being.

    But America’s legal and political climate was shifting too. Thousands of workers would file lawsuits against computer manufacturers during this period, claiming that their products had caused injury and disability. More than 20 major cases went to jury trials—and all of them failed. In 2002, the Supreme Court ruled against an employee of Toyota who said she’d become disabled by carpal tunnel as a result of working on the assembly line. (The car company was represented by John Roberts, then in private appellate-law practice.) Meanwhile, Republicans in Congress managed to jettison a new set of OSHA ergonomics standards before they could go into effect, and the George W. Bush administration ended the requirement that employers separate out RSI-like conditions in their workplace-injury reports to the government. Unsurprisingly, recorded cases dropped off even more sharply in the years that followed.

    Blue-collar workers in particular would be left in the lurch. According to M. K. Fletcher, a safety and health specialist at the AFL-CIO, many laborers, in particular those in food processing, health care, warehousing, and construction, continue to suffer substantial rates of musculoskeletal disorders, the term that’s now preferred over RSIs. Nationally, such conditions account for an estimated one-fifth to one-third of the estimated 8.4 million annual workplace injuries across the private sector, according to the union’s analysis of Bureau of Labor Statistics reports.

    From what experts can determine, carpal tunnel syndrome in particular remains prevalent, affecting 1 to 5 percent of the overall population. The condition is associated with multiple health conditions unrelated to the workplace, including diabetes, age, hypothyroidism, obesity, arthritis, and pregnancy. In general, keyboards are no longer thought to be a major threat, but the hazards of repetitive work were always very real. In the end, the “crippled by computers” panic among white-collar workers of the 1980s and ’90s would reap outsize attention and perhaps distract from the far more serious concerns of other workers. “We engage in a disease-du-jour mentality that is based on idiosyncratic factors, such as journalists being worried about computer users, rather than prioritization by the actual rate and the impact on employment and life quality,” Gerr, the occupational- and environmental-health expert at the University of Iowa, told me.

    As for today’s potential “hazards at the keyboard,” we know precious little. Almost all of the research described above was done prior to 2006, before tablets and smartphones were invented. Workplace ergonomics used to be a thriving academic field, but its ranks have dwindled. The majority of the academic experts I spoke with for this story are either in the twilight of their careers or they’ve already retired. A number of the researchers whose scholarship I’ve reviewed are dead. “The public and also scientists have lost interest in the topic,” Pieter Coenen, an assistant professor at Amsterdam UMC and the lead author of the metaanalysis from 2019, told me. “I don’t think the problem has actually resolved.”

    So is there substantial risk to workers in the 2020s from using Slack all day, or checking email on their iPhones, or spending countless hours hunched at their kitchen tables, typing while they talk on Zoom? Few are trying to find out. Professionals in the post-COVID, work-from-home era may be experiencing a persistent or resurgent rash of pain and injury. “The industrial disease of the information age” could still be raging.

    Benjamin Ryan

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  • Half of global prison tuberculosis cases remain undetected

    Half of global prison tuberculosis cases remain undetected

    Newswise — In 2019, incarcerated people across the globe developed tuberculosis (TB) at nearly 10 times the rate of people in the general population, according to a new study led by Boston University School of Public Health (BUSPH).

    Published in The Lancet Public Health, the study found that 125,105 of the 11 million people incarcerated worldwide developed tuberculosis in 2019, a rate of 1,148 cases per 100,000 persons per year.

    Despite this high case rate, nearly half of TB cases among incarcerated people were not detected.

    The findings reveal the first global and regional estimates of new TB cases among incarcerated people, a population at high risk of developing this life-threatening disease. Collectively, the high case rate and low detection underscore the need for greater awareness and resources to reduce the burden of TB in prisons and other high-risk settings.

    “Our study showed that only 53 percent of people that develop tuberculosis in prisons are diagnosed, which suggests that incarcerated people are neglected and have minimal healthcare services to diagnose tuberculosis,” says study lead and corresponding author Dr. Leonardo Martinez, assistant professor of epidemiology at BUSPH.

    To better understand TB rates among this population, Dr. Martinez and colleagues acquired data from published research and from countries’ federal officials to analyze TB prevalence and incidence in 193 countries at the country, regional, and global level between 2000-2019. The team also calculated TB case detection rates per year in each country for 193 countries.

    The African region had the highest rate of new TB cases in 2019, at 2,242 cases per 100,000 persons per year, but the Americas region—largely driven by Central and South America—had the greatest number of total cases, which increased nearly 90 percent since 2000. The countries with the highest number of new cases in prisons in 2019 were Brazil, Russia, China, the Philippines, and Thailand.

    Importantly, the team found that new TB case rates remained consistently between 1,100 and 1,200 cases per 100,000 persons per year from 2012-2019.

    “This stagnation suggests that current tuberculosis control policy in prisons is insufficient to decrease the tuberculosis burden and that supplementary interventions and policy implementation are needed,” says Dr. C. Robert Horsburgh, professor of global health at BUSPH.

    Mass incarceration is one major driver of TB transmission—both inside and outside of prisons.  Overcrowding, where some prison cells contain up to 30 people, causes TB to “spread like wildfire,” Dr. Martinez says, and this transmission can spill over easily into the community.

    “Contrary to popular belief, persons that are incarcerated are a mobile population, and in many countries, the duration of incarceration is very short,” he says. “People go into prison, then come out, then may go back in again. So, very often, people that develop tuberculosis in prison end up transmitting the disease to many people outside of prison once they are released. Since almost half of people with tuberculosis in prisons are not diagnosed, many still remain infectious when they enter back into the general community.”

    The team hopes that these findings will encourage global and regional health organizations to develop routine monitoring of TB among incarcerated people, as they do for other high-risk populations such as people with HIV and household contacts. The researchers say that their comprehensive compilation of TB case notifications—which they retrieved directly from federal officials, national and regional organizations, and non-governmental organizations—is a clear indication that information about TB in prisons is both accessible and retrievable by global organizations such as the World Health Organization.

    The team is currently working with several health organizations to attempt to update global guidelines on how to manage and reduce TB in prisons, as the most recent guidelines were written in the year 2000.

    “One of the reasons this population is so neglected is because of the lack of data,” Dr. Martinez says. “Our hope is that these results can help stakeholders understand the urgency of the issue and the amount of people in prisons that develop tuberculosis and remain undiagnosed for long periods of time and can spur them to take action.”

    **

    Boston University School of Public Health

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  • Health policy experts call for confronting anti-vaccine activism with life-saving counter narratives

    Health policy experts call for confronting anti-vaccine activism with life-saving counter narratives

    Newswise — Public and private sector health officials and public policymakers should team up immediately with community leaders to more effectively disseminate accurate narratives regarding the life-saving benefits of vaccines to counter widespread, harmful misinformation from anti-vaccine activists in the United States, according to a new Viewpoint piece in The Lancet, led by authors at Boston University School of Public Health (BUSPH), University of California, Riverside (UCR), and The Stanford Internet Observatory Cyber Policy Center (SIO) at Stanford University.

    Published in the leading international medical journal on Friday, March 3, the Viewpoint provides valuable insight into the recent developments of US-based anti-vaccine activism and proposes strategies to confront this dangerous messaging.

    “Messages of health freedom gained traction during the pandemic, turning members of the public against public health messages and prevention-focused activities, including vaccination,” says second author Timothy Callaghan, associate professor of health law, policy & management at BUSPH, and who was one of three lead writers of the Viewpoint, along with lead author Richard Carpiano, public policy professor at UCR, and third author Renee DiResta, technical research manager at SIO.

    In the Viewpoint, the authors and 18 other leading public health experts describe a perfect storm that allowed anti-vaccine activism, once a fringe subculture, to become a well-organized form of right-wing identity with narratives that associate refusing vaccines with personal liberty. This narrative was consistently repeated and amplified by social media influencers, pro-Donald Trump political operatives, and right-wing blogs, podcasts, and other media as the COVID-19 pandemic spread worldwide.

    The authors underscore the need to consistently amplify accurate science and information through multiple communication channels, to avoid the spread of inaccurate or misleading information to people through limited sources. 

    “This is a matter of life and death,” says Carpiano. “People don’t always see it that way. We’ve forgotten how many people have died, have been sick, or continue to get sick from COVID-19 as well as many other vaccine-preventable diseases.” 

    The paper comes out at a time when more than 1.1 million people have died from COVID-19, and the worldwide toll is estimated at 6.8 million. The disease continues to spread as vaccines have been found to greatly reduce illnesses that require hospitalization or result in death.

    Anti-vaccination activism has existed as long as there have been vaccines. But the movement picked up steam in 1998 when British physician Andrew Wakefield published a now-discredited study that falsely claimed a link between childhood vaccines and autism.

    In more recent years, however, anti-vaccine messaging shifted in large part from health-effect concerns to conservative and libertarian political identity arguments of medical freedom and parental rights. This was prompted in part by legislative efforts in several states to eliminate personal belief exemptions from school vaccination requirements in response to falling child vaccination rates and vaccine-preventable disease outbreaks. But these arguments were confined to childhood vaccines and were somewhat contained. 

    Since the COVID-19 pandemic affected the entire population, it brought on a vast expansion of not only anti-vaccine activism, but more broadly, anti-public health activism as people faced the inconveniences of mask-wearing, social distancing, closed restaurants and bars, and cancelations of concerts and other events that draw crowds.

    Celebrities, wellness influencers, partisan pundits, and certain scientists and clinicians, among others, joined the fray, often spreading false and misleading claims about vaccinations. The increasing number of voices found larger audiences, which meant more votes for right-wing candidates, and greater monetization of right-leaning social and media outlets.

    “As celebrities, influencers, and politicians started speaking out negatively about vaccination, growing segments of the American public were exposed to these messages, shifting troubling proportions of the US public who had previously vaccinated in other contexts against getting vaccinated for COVID-19,” Callaghan says.   

    The result was more people becoming ill.

    “Political leaders were sadly, particularly effective anti-vaccine messengers, and because of that, we now have clear disparities in COVID-19 vaccination rates across party lines” he says.

    Meanwhile, pro-vaccine messaging has been based on the statements of individual public health experts, such as former director of the National Institute of Allergy and Infectious Diseases Anthony Fauci and director of the US Centers for Disease Control and Prevention Rochelle Walensky, who the authors say are outgunned.

    Callaghan, Carpiano, and DiResta were part of the Commission on Vaccine Refusal, Acceptance, and Demand in the USA that The Lancet convened to examine issues surrounding COVID-19 vaccine acceptance uptake, acceptance, and hesitancy. The membership is composed of 21 national experts from public health, vaccine science, law, ethics, public policy, and the social and behavioral sciences.  

    The group recommends the development of networked communities that simultaneously share information with different audiences about the health and economic benefits of vaccines. This would preempt the well-funded messaging of the antivaccine movement.

    “Without concerted efforts to counter the anti-vaccine movement, the USA faces an ever-growing burden of morbidity and mortality from an increasingly under-vaccinated, vaccine hesitant society,” the authors conclude in the paper.

    **

    About Boston University School of Public Health

    Founded in 1976, Boston University School of Public Health is one of the top five ranked private schools of public health in the world. It offers master’s- and doctoral-level education in public health. The faculty in six departments conduct policy-changing public health research around the world, with the mission of improving the health of populations—especially the disadvantaged, underserved, and vulnerable—locally and globally.

    Boston University School of Public Health

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  • Across the US, white neighborhoods have more greenery, fewer dilapidated buildings, fewer multi-family homes

    Across the US, white neighborhoods have more greenery, fewer dilapidated buildings, fewer multi-family homes

    Newswise — Historic redlining and other racist policies have led to present-day racial and economic segregation and disinvestment in many cities across the United States. Research has shown how neighborhood characteristics and resources are associated with health disparities such as preterm birth and asthma, but most of these studies are limited in scale and overlook many aspects in a neighborhood that are difficult to measure, including dilapidated buildings and crosswalks.

    Now, a new study led by Boston University School of Public Health (BUSPH) and the Center for Antiracist Research (CAR) at Boston University (BU) has utilized panorama digital technology through Google Street View (GSV) to identify these neighborhood characteristics on a national scale and shed light on how they contribute to racial and ethnic disparities in local resources and health outcomes across the US.

    Published in the journal JAMA Network Open, the study found that predominantly White neighborhoods had better neighborhood conditions generally associated with good health, such as fewer neglected buildings and multi-family homes, and more greenery than neighborhoods with residents who were primarily Black, of other minority races, or of a variety of races and ethnicities. 

    The findings underscore the need for comprehensive and accessible data platforms that researchers can utilize to better understand the role of the built environment on racial and health inequities, and inform policies that aim to create equitable neighborhood resources in all communities.

    “Large datasets on determinants of health can help us better understand the associations between past and present policies—including racist and antiracist policies—and neighborhood health outcomes,” says study corresponding author Dr. Elaine Nsoesie, associate professor of global health at BUSPH. “Neighborhood images are one dataset that have the potential to enable us to track how neighborhoods are changing, how policies are impacting these changes and the inequities that exist between neighborhoods.”

    For the study, Dr. Nsoesie and colleagues analyzed national data on race, ethnicity, socioeconomics, and health outcomes, and 164 million GSV images across nearly 60,000 US census tracts. The team examined five neighborhood characteristics: dilapidated buildings, green spaces, crosswalks, multi-family homes, and single-lane roads.

    The largest disparities in neighborhood environments were reflected in green space and non-single family homes. Compared to predominantly White neighborhoods, predominantly Black neighborhoods had 2 percent less green space, and neighborhoods with racial minorities other than Black had 11 percent less green space. Compared to White neighborhoods, neighborhoods with racial minorities other than Black had 17 percent more multi-family homes, while neighborhoods with Black residents and neighborhoods with residents representing a variety of races and ethnicities had 6 percent and 4 percent more multi-family homes, respectively.

    The researchers also conducted modeling to measure how the built environment may influence the association between health outcomes and the racial makeup of neighborhoods, and found the strongest connections between sleeping problems among residents in neighborhoods with racial minorities other than Black or White, and asthma among neighborhoods with residents representing a variety of races and ethnicities.

    “An interesting finding from our paper is how a considerable portion of the racial/ethnic differences of the built environment conditions was shown at the state level,” says study co-lead author Yukun Yang, a data scientist at CAR. “This prompts us to think practically about how state and local government and policymakers could and should address the inequitable distribution of built environment resources which could further address the health disparities we observed today.” 

    “Our findings really demonstrate the path-dependent nature of inequality and racial disparities,” says study co-lead author Ahyoung Cho, a racial data/policy tracker at CAR and a political science PhD student at BU. “It is critical to develop appropriate policies to address structural racism.”

    **

    About Boston University School of Public Health

    Founded in 1976, Boston University School of Public Health is one of the top five ranked private schools of public health in the world. It offers master’s- and doctoral-level education in public health. The faculty in six departments conduct policy-changing public health research around the world, with the mission of improving the health of populations—especially the disadvantaged, underserved, and vulnerable—locally and globally

    Boston University School of Public Health

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