A little over a year after the World Health Organization first announced a string of mysterious illnesses, the agency will travel to their point of origin to investigate how it all started.
A key mutation increase the ability of the virus to bind to human cells, but Pfizer's vaccine still works against it.
A coronavirus variant identified in South Africa may not be as vulnerable to COVID-19 vaccines as other strains, some scientists say.
To protect endangered black-footed ferrets from COVID-19, scientists in Colorado have injected a major captive breeding population with an experimental vaccine.
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.