Coronavirus

It’s too soon to know if the variant causes milder COVID, but its transmissibility and ability to evade vaccines are still cause for concern

A rapidly spreading variant could dangerously strain health-care systems, even if the severe disease risk is relatively low for an individual

The new coronavirus variant may be better than other versions at avoiding human immune defenses—but that ability may change in different countries

After my son got sick, I dived into the data, and it turns out vaccinated people can and do spread COVID

An expert answers questions about when and how to use the tests

The rapid spread of new variants such as Omicron offers clues to how SARS-CoV-2 is adapting and how the pandemic will play out over the next several months

The rapid spread of new variants such as Omicron offers clues to how SARS-CoV-2 is adapting and how the pandemic will play out over the next several months

The numerous changes in the coronavirus’s spike protein could have arisen in an isolated population or an immunocompromised person—or animals

Vaccination is likely to prevent many more COVID cases than it is to cause a rare and nonfatal heart side effect in five- to 11-year-olds

Researchers are racing to determine whether a fast-spreading coronavirus variant poses a threat to COVID vaccines’ effectiveness

With the advent of new COVID drugs comes the fear that people will opt out of vaccination altogether

From conjunctivitis to vertigo, coronavirus infections can affect disparate senses