With more people getting infected multiple times, experts are looking into what is driving...
breakthrough
Many older and more vulnerable people, who have not gotten the booster shot yet,...
Breakthrough deaths comprise a larger share of COVID-19 deaths amid a surge of cases...
Jonathan Karl interviews Dr. Ashish Jha, dean of the Brown University School of Public...
The CDC is considering revising its mask guidance for fully vaccinated people as a...
As a national debate rages over masks, Pfizer now says a third COVID-19 shot...
ABC News’ Devin Dwyer reports on a new rapid saliva swab tests that could...
Former Homeland Security Adviser Tom Bossert — also an ABC News contributor — discusses...
Vaccine Watch: What’s next for Pfizer’s COVID vaccine breakthrough
ABC News’ Bob Woodruff reports on Pfizer’s COVID vaccine and the challenges for how...
