Think

A ‘Historical Event’: First Malaria Vaccine Approved by W.H.O.

The Delta variant caused a spike in deaths among nursing home residents, study finds.

When Was the First U.S. Covid Death? C.D.C. Investigates 4 Early Cases

When Will the Delta Surge End?

In a Handful of States, Early Data Hint at a Rise in Breakthrough Infections

What to Know About Breakthrough Infections and the Delta Variant

Nursing Homes Confront New Covid Outbreaks Amid Calls for Staff Vaccination Mandates

New Therapy for Aggressive Prostate Cancer Improves Survival

Heart Problems After Vaccination Are Very Rare, Federal Researchers Say

Brazil reported one of the highest Covid death tolls in the world.

How the Virus Unraveled Hispanic American Families

C.D.C. Will Not Investigate Mild Infections in Vaccinated Americans

C.D.C. Will Not Investigate Mild Infections in Vaccinated Americans

Severe Covid Is More Often Fatal in Africa Than in Other Regions

Plan to Ditch the Mask After Vaccination? Not So Fast.

Americans Must Tighten Up, or Double Up, Their Masks, C.D.C. Says

Drug Prevents Coronavirus Infection in Nursing Homes, Maker Claims

Drug Prevents Coronavirus Infection in Nursing Homes, Maker Claims

2 Arthritis Drugs Reduce Deaths in Very Ill Covid Patients, Study Finds

Good News About the Coronavirus Vaccine Is Becoming Contagious