severe disease

Staff volunteers queue to receive a fourth dose of the Pfizer COVID-19 vaccine at Sheba Medical Center in Israel on Dec. 27, 2021, as the hospital conducted a trial of a fourth jab of the vaccine.

Science
Health & Safety

Who might benefit from a 4th shot — and who might not

8:33pm February 22, 2022

by Michaeleen Doucleff

Some countries are moving ahead with plans to offer a fourth dose of COVID-19 vaccine. But studies are raising questions about the potential advantages of this extra booster.

This colorized transmission electron micrograph image shows SARS-CoV-2, the coronavirus that causes the disease COVID-19. This specimen was isolated from a patient in the United States. Particles of the virus (yellow) are emerging from the surface of cell

Science
Health & Safety

Fact check: The theory that SARS-CoV-2 is becoming milder

4:19pm January 14, 2022

by Michaeleen Doucleff

A look at the data that omicron is less severe. What does that mean for the future of SARS-CoV-2 — and the pandemic?