Several severe allergic reactions that were reported among hundreds of thousands of people vaccinated with the Pfizer-BioNTech coronavirus vaccine last week.
The variant has a mutation that may make the virus "sticker" or allow it to bind more tightly to human cells.
As of late summer, governments around the world had pledged US$12.2 trillion of relief in response to the coronavirus pandemic.
On Monday (Dec. 14), the very first doses of Pfizer's COVID-19 vaccine was given in the U.S., marking the start of a long campaign to vaccinate the U.S. public.
A new model projects how case rates, hospitalizations and deaths will fall as COVID-19 vaccinations begin.
Overall, the vaccine was 52% effective after the first dose and 95% effective after the second dose.
How will you know if you have the novel coronavirus that causes the COVID-19 disease? Here are the most common symptoms.
The recommendations for self-isolation — for people who test positive for COVID-19 — have not changed.
Researchers studied blood samples from December 2019, and found a small number tested positive for antibodies against the virus.
New data from Moderna's phase 3 trial confirm that the vaccine is highly effective and protects against severe disease.
More than 100 SARS-CoV-2 infected mink may have escaped from Danish farms, raising the risk that these escapees could spread the novel coronavirus to wild animals.