Science Senior Correspondent Jon Cohen explains how each of the vaccines can protect us from severe illness.
Test-tube studies suggest the South African coronavirus variant might be able to escape antibodies roused by vaccines.
Moderna plans to start development of booster shots tailored to B.1.351 and other variants of COVID-19. Other vaccinemakers are also contemplating updates.
Regeneron revealed that when it gave an antibody cocktail to 186 people living with someone who had COVID-19, none developed symptomatic disease.
Some question if Budi Gunadi Sadikin, who has a degree in nuclear physics, can help the country recover.
A new, more transmissible coronavirus variant has upended efforts to balance the known harm that closed schools cause against the risk that the pandemic virus might spread in classrooms.
President-elect Joe Biden proposed the "American Rescue Plan" in an effort to combat the pandemic and the effects it has on the country.
Scientists are focusing on a potential new threat: variants that could do an end run around the human immune response.
Several new tests look for SARS-CoV-2 in saliva, and the new work finds a striking correlation between high virus levels and later hospitalization or death.
After a discontinued first attempt, WHO heads back to China to continue its investigative mission to study the COVID-19 pandemic's origins.
The United Kingdom decided to allow up to 12 weeks between doses of two authorized vaccines, rather than the 3 or 4 weeks tested in trials.