EXPLAINER: What do we know about booster shots for COVID-19?
U.S. health officials may soon recommend COVID-19 booster shots for fully vaccinated Americans. A lo...
EXPLAINER: How do border policies affect US infection rates?
As the delta variant fuels an increase of COVID-19...
EXPLAINER: Why India is shattering global infection records
The world’s fastest pace of spreading infect...
EXPLAINER: What we know about AstraZeneca blood clot reports
German officials have decided to limit the use of ...