News reports about polio's return worry parents. An expert explains the two types of poliovirus and the importance of herd immunity.

As governments and health officials navigate pandemic, researchers stress the danger that comes with bad information.

An observational study finds that antibody levels are higher when health care workers received the SARS-CoV-2 vaccine in the afternoon.

A new decision-support tool helped preserve the health care workforce by distinguishing symptoms associated with COVID-19 vaccinations from symptoms of the virus itself.

Wrestling with a health care conundrum: how to get people to listen?

Ofer Levy, who directs Boston Children’s Hospital’s Precision Vaccines Program, discussed the news that the Pfizer-BioNTech vaccine has been shown to be safe in school-age children, a potentially key development in the fight to bring the coronavirus pandemic under control.

Dan Barouch, Harvard Medical School professor and head of Beth Israel Deaconess’ Center for Virology and Vaccine Research, was awarded Harvard’s George Ledlie Prize for work that culminated in one of three vaccines against COVID-19 approved for use in the U.S.

Harvard Associate Professor of Epidemiology William Hanage provides tips on how to deal with the Delta variant of COVID-19.

Robert Blendon examined the divide among Americans over vaccine mandates.

Single-shot COVID-19 vaccine generates robust immune responses against variants.