Public Health On Call

About this episode: The World Health Organization is reporting thousands of cases of malnutrition and 74 civilian deaths resulting from mass starvation in Gaza in 2025. In this episode: Dr. Paul Spiegel discusses the origins of the crisis and recent developments and shares what this dire situation means for the future of the international humanitarian system. Guest: Dr. Paul Spiegel is a physician...

About this episode: Since the 1980s, petrochemical production along an 85-mile stretch of the Mississippi River has designated the corridor as "Cancer Alley," but recent research shows that the risks from air pollution in the region have been seriously underestimated. In this episode: Pete DeCarlo and Keeve Nachman of the Johns Hopkins University discuss their concerning findings about compounding...

About this episode: The United States stands at a pivotal juncture in eliminating HIV. Despite recent advancements, including the development of an effective new form of pre-exposure prophylaxis (PrEP), an uncertain future marked by cuts to Medicaid and research hurdles threatens to undo the country's progress. In this episode: Jeremiah Johnson, Executive Director of PrEP4All, sheds light on the u...

About this episode: In the 1980s, Colombian neurologist Francisco Lopera discovered a rare genetic mutation afflicting residents of a village outside Medellín that could hold the key to understanding and treating Alzheimer's disease. In this episode: Author Jennie Erin Smith talks about her new book Valley of Forgetting: Alzheimer's Families and the Search for a Cure and how families in the Paisa...

About this episode:  In early July, the CDC deactivated the United States' H5N1 emergency response, citing lowered rates of infection among animals and humans. But fewer cases might not indicate an end to the years-long emergency. In this episode: Dr. Erin Sorrell of the Johns Hopkins Center for Health Security details the timeline of the virus, its impacts on American farmers, and how to prepare...

About this episode: The recent dismissal of all members of the CDC's Advisory Committee on Immunization Practices (ACIP) has stirred questions about vaccine safety and immunization protocols. In this episode: Dr. Grace Lee—a former ACIP chair—shares insights on the committee's crucial role in recommending vaccines uses, the importance of transparent decision-making, and dangers of abandoning stron...

About this episode: The deadly Fourth of July floods in Kerr County, TX are raising urgent concerns about flash flooding risks and the future of storm response. In this episode: Hurricane specialist and storm surge expert Michael Lowry discusses what causes increasingly intense storms, details the significant strides made in forecasting, and outlines what's at stake with potential cuts to NOAA. Gu...

About this episode:  Artificial intelligence is changing everything about how we work, live, and study—and, now, AI therapy chatbots are poised to transform mental health care. In this episode: Stanford researcher Nick Haber details recent data that suggests that therapeutic AI has a long way to go in addressing biases and recognizing safety-critical situations in order to provide adequate care. G...

About this episode: For mothers questioning whether or not to vaccinate their children, the decision can be complicated by an overwhelming and, at times, conflicting information environment. In this episode: Health communication researcher Melissa Carrion explores how an onslaught of messaging is informing how mothers decide to vaccinate their kids and how public health experts can better communic...

About this episode: Asthma can cause sometimes debilitating symptoms for children who have it, and some—particularly Black and Hispanic children—can experience higher rates of diagnoses, hospitalizations and emergency department visits. In this episode: pediatrician and immunology researcher Dr. Elizabeth Matsui talks about the known causes behind childhood asthma and how it impacts youths, and ho...

About this episode: Caregivers—both paid and unpaid—are the silent backbone of the nation's workforce, providing crucial support to America's young, aging, and disabled populations. But 24 states stand on the precipice of crisis with looming threats to caregiver stipends, salaries, and other resources. In this episode: what led to this tipping point, how proposed cuts to Medicaid could make it wor...

About this episode: American farms, restaurants, retailers, and households throw out nearly 30% of the food in our system, landfilling millions of tons of food each year and draining resources like land and energy. Households generate the most waste, with everyday cooks overbuying at grocery stores and throwing away a substantial portion of their purchases—but getting ahead of those scraps can mak...

About this episode: Since the 1950s, companies have been using PFAS—or "forever chemicals"—to manufacture everyday household items from waterproof mascara to shaving cream to Bandaids. Research and advocacy have not only linked these chemicals to certain cancers, liver disease, and fertility issues, but they have also posited that 97% of Americans have traces of PFAS in their blood. In this episod...

About this episode: Consumer wearables like Fitbits track a lot of our activity, from time spent standing to estimates of calorie expenditure. What if they could also alert us to possible health issues as we age? In this episode: How movement patterns change with aging, and how researchers are examining ways to measure those patterns to determine what's normal and what may be associated with cogni...

About this episode: Growing and producing our food comes at an extreme cost to the environment. In this episode: a conversation about climate and agriculture with journalist and author Michael Grunwald, whose blunt new book looks at how the food system is wiping out wetlands, forests, and other carbon reservoirs that protect us from global warming. Guest: Michael Grunwald is a journalist and autho...

About this episode: What might be in store for the 2025 hurricane season? Meteorologist Brian McNoldy returns to the podcast to talk about how things are shaping up, a look back at how last summer's unprecedented mix of heat and moisture played out in an extremely active season, and a zoomed-out look at climate change trends as larger patterns beyond individual events and year-over-year comparison...

About this episode: Juneteenth was declared a federal holiday in 2021 but many people don't know the history or how to recognize the day. In this episode: a look back at a 2022 conversation with Janice Bowie about how to celebrate, reflect, and recommit to social justice this Juneteenth. Guest: Janice Bowie is a Bloomberg Centennial Professor in Health, Behavior, and Society at the Johns Hopkins B...

About this episode: Homicides in the U.S., particularly those involving gun violence, peaked in 2022 following a rapid rise during the COVID pandemic. In the years that followed, there were notable decreases and 2025, so far, shows one of the most dramatic reductions in homicides in decades. In this episode: A look at some of the reasons behind the rise and fall of deaths, and why staying the poli...

About this episode: Humanitarian health systems provide relief like food, water, and medicine in crisis situations. They operate within a carefully organized framework built on core principles including impartiality and neutrality. In this episode: what's happening with humanitarian aid in Gaza and the importance of a new framework for global humanitarian efforts. Guest: Dr. Paul Spiegel  is a phy...

About this episode: In 2016, the nonprofit Braver Angels was founded to bring together diverse groups of people to try and figure out why productive communication has become so difficult. During the pandemic, the conversations got even harder. In this episode: How Braver Angels is bringing together questioners and supporters of public health to hear each other out with a goal of humanizing, unders...

About this episode: A recent MAHA report from the Department of Health and Human Services stated that a trio of common procedures for children—tonsillectomy, adenoidectomy, and tympanostomy tube (ear tube) placement—"cause harm without offering benefits." In this episode: a look at what these surgeries are, the advantages and risks, and what the report said—and didn't say—about the value of these...

About this episode: Would it be a good idea to have tariffs on pharmaceuticals? In this episode: a conversation about the rationales for tariffs as well as potential downsides—like higher drug prices—and what could really help with supply and pricing issues. Guest: Dr. Mariana Socal studies the pharmaceutical market and is an associate professor in Health Policy and Management at the Johns Hopkins...

About this episode: A new report from the Safeguarding Health in Conflict Coalition documents incidents of violence against health care facilities and workers in conflict zones around the world. In this episode: why it's important to track these trends, how incidents are reported and investigated, and a look at the 2024 report with examples from various conflict zones around the world including Su...

About this episode: June is Gun Violence Awareness Month with a focus on safe storage, a key factor in preventing gun-related injuries and deaths. In this episode: a look at how safe storage saves lives, evidence-based tools and tips for lawmakers, gun owners, parents, pediatricians, and more; and how to normalize conversations about safe storage in everyday life. Guests: Dr. Katherine Hoops , is...

About this episode: Last week, Health Secretary Robert F. Kennedy, Jr., announced that the COVID vaccine will no longer be recommended for healthy children or pregnant women. In this episode: a vaccine policy expert unpacks the announcement — how it differs from past policy changes, and its potential impact on Americans. Note: This episode was recorded on May 28, 2025. Guest: Sarah Despres  has ov...