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Evidence and experts to help you understand today’s public health news—and what it means for tomorrow.

Sep 30, 2021

What, exactly, is a booster shot? For which groups has the FDA authorized Pfizer boosters? What about boosters for Moderna and J&J? Will we need a fourth shot in the future? Will there be a delta-specific booster? Would it make a difference in world vaccine supply if the US refrained from giving any boosters? Stephanie...


Sep 29, 2021

Last spring, India experienced a catastrophic wave of COVID-19 infections with more than 100,000 cases per day, exceeding hospital capacity in some areas and leading to oxygen shortages. What has happened since? From their homes in India, infectious disease researchers Dr. Vidya Mave and Dr. Brian Wahl talk with Dr....


Sep 27, 2021

With the rollout of vaccines earlier this year, the concept of “herd immunity”—the idea that enough people would become immune to COVID-19 that we could more or less “return to normal”—seemed plausible. But a number of factors are complicating the US’s fight against the pandemic and we’re still seeing...


Sep 24, 2021

Where are we with testing technology? Why is the demand for testing surging and are there enough tests? When is the best time to use at-home testing given the cost? What’s the difference between PCR and rapid antigen tests and how accurate are they in different circumstances? Dr. Gigi Gronvall gives an update...


Sep 22, 2021

Mississippi is leading the nation in the rate of COVID deaths. Dr. Thomas Dobbs, the state’s health commissioner, talks with Dr. Josh Sharfstein about the state's pandemic crisis, including its impact on pregnant women, the role of misinformation, and the impact on the health care system.