Four years after the COVID-19 pandemic spread around the world, a new PBS documentary series, "The Invisible Shield," features Dr. Amy Acton and reviews how the field of public health was instrumental in saving lives in the U.S.

Scientists studying the causes of long COVID symptoms are proposing a surprising pathway. Their research weaves together several prominent lines of evidence on what might be driving the condition.

The new vaccine is a different formulation from earlier shots. It's also not paid for by the federal government.

Vaccines for a fall immunization drive against COVID-19 just got the green light from the Food and Drug Administration. The agency says the vaccines can protect people, as hospitalizations tick up.

After vaccines became widely available in 2021, "the excess death rate among Republican voters was 43% higher than the excess death rate among Democratic voters," Yale researchers say.

For many of us, COVID is becoming an increasingly distant memory. But in rural Ohio, where the state’s vaccine rates are among the lowest, one health department is still trying new ways to get people vaccinated.

Federal COVID-19 policies are changing, but some of Ohio’s practices for handling the pandemic will remain in place indefinitely.

Advisers to the U.S. Food and Drug Administration today endorsed a proposal to make big changes in the nation's approach to vaccinating people against COVID-19.

You'll see testing in some airports these days — it's just like we're going back in time! And speaking of looking back, the things that protected fliers from COVID then are still a good idea.

For those at high risk, Pfizer's antiviral drug helps stave off severe COVID-19. Now research suggests it may also reduce their chances of long COVID.