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.
Scientists around the world are creating dozens of unique vaccine candidates to fight the novel coronavirus — and they're doing it at unprecedented speeds.
How did Americans celebrate the holidays during the influenza pandemic of 1918? With a lot of partying, turns out.