Investigate

Charting an Omicron Infection

What It Takes to Understand a Variant

New Covid Pills Offer Hope as Omicron Looms

Dr. Sherif R. Zaki, Acclaimed Disease Detective, Dies at 65

The Coronavirus in a Tiny Drop

Trust in Science and Scientists Increased Globally, Poll Finds

Merck says its antiviral pill is less effective in a final analysis.

What We Know So Far About Waning Vaccine Effectiveness

Widespread Coronavirus Infection Found in Iowa Deer, New Study Says

N.I.H. Letter on EcoHealth Alliance’s Late Study Filings

Bat Research Group Failed to Submit Virus Studies Promptly, N.I.H. Says

Newly Discovered Bat Viruses Give Hints to Covid’s Origins

Henrietta Lacks, Whose Cells Were Taken Without Her Consent, Is Honored by W.H.O.

The W.H.O. names an advisory group to study the origins of the pandemic.

Merck applies for emergency approval for what would be the first pill to treat Covid.

Boosters are most likely on the way for recipients of the Moderna and J. &. J. vaccines.

‘Go out there and enjoy Halloween,’ Dr. Fauci says.

Only a fraction of U.S. health care workers are risking their jobs over vaccinations.

Boosters for Moderna and Johnson & Johnson vaccine recipients weren’t up for debate during a C.D.C. panel.

How to Vaccinate a Siberian Reindeer Herder