Scientists around the world are creating dozens of unique vaccine candidates to fight the novel coronavirus — and they're doing it at unprecedented speeds.
Researchers have identified a crucial immune system mechanism that could help explain why the coronavirus is so lethal for some people.
Among the top news today: The U.S. is still in the first wave of the pandemic and there have now been more than 32.2 million COVID-19 cases reported worldwide.
Customers will have the option to take a COVID-19 test at the airport or to submit a self-collected mail-in test.
How fast is the novel coronavirus, SARS-CoV-2, mutating? And how have those genetic changes affected the virus?
The Centers for Disease Control and Prevention acknowledged what scientists have been saying for a while: the coronavirus can spread through the air. Then, they took it back.
Single-cell microbes known as bacteria are simpler than most forms of life, yet they are still intriguingly complex.
The guideline change comes after strong criticism from public health experts and a report that the updated guidelines were posted despite objections from CDC scientists.
Other vaccine makers have been criticized for giving too little information on their clinical trials.
It's still too early to recommend that everyone don eyeglasses, goggles or face shields in public to protect against COVID-19.