A new study points to intriguing differences in the immune responses of people who have recovered rapidly from COVID-19.

Will a vaccine alone protect against COVID-19? Not likely. U.S. health leaders, including Anthony Fauci, recently discussed lessons learned from the pandemic.

Why do some children develop a severe inflammatory illness after exposure to SARS-CoV-2? Scientists are searching for answers.

Even a safe and effective vaccine won't help control COVID-19 if people won't take it. Top scientists look at how we're developing and regulating new medicines.