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An F.D.A. panel endorses Merck’s Covid pill for high-risk adults.

South African Company Nears License to Sell J. & J. Covid Shot Across Africa

Regeneron says its antibody treatment may not be as effective against Omicron, but testing is underway.

The C.D.C. strengthened its booster recommendations as worries mount over the Omicron variant.

Omicron carries scary mutations. That doesn’t mean they work well together.

Antiviral Covid Pills Are Coming. Will There Be Enough Tests?

Stamping Bar Codes on Cells to Solve Medical Mysteries

Does Omicron cause only mild illness? The jury is still out.

As Covid Infections Spread, Nursing Homes Lag Behind on the Rollout for Booster Shots

A Cure for Type 1 Diabetes? For One Man, It Seems to Have Worked.

Families Cheer, Some Doctors Worry as Nursing Homes Open Doors Wide to Visitors

New Virus Variant Stokes Concern but Vaccines May Still Work

Texas Abortion Law Complicates Care for Risky Pregnancies

The Smallest Covid Threats Get Their Shields

Zena Stein, 99, Dies; Researcher Championed Women’s Health

CVS, Walgreens and Walmart Perpetuated Opioid Crisis, Jury Finds

Disney puts worker vaccine mandate on pause after Florida ban on restrictions.

When Can the Covid Masks Finally Come Off?

A C.D.C. study finds stillbirths are higher in pregnant women with Covid.

C.D.C. Panel Endorses Covid Vaccine Booster Shots for All Adults

Pfizer-BioNTech and Moderna boosters for all adults endorsed by a C.D.C. panel.

Ahead of the holidays, a C.D.C. panel is set to weigh Pfizer-BioNTech and Moderna boosters for all adults.

The first known Covid case was a vendor at a Wuhan market, a scientist claims.

First Known Covid Case Was Vendor at Wuhan Market, Scientist Claims

Pfizer will allow its Covid pill to be made and sold cheaply in poor countries.

Pfizer Will Allow Its Covid Pill to Be Made and Sold Cheaply in Poor Countries

The U.S. surgeon general says blocking vaccine rules creates a ‘setback’ for public health.

Why Don’t We Have a Covid Vaccine for Pets?

What to Know About the Coronavirus in Pets

The U.S. surgeon general says blocking vaccine rules creates a ‘setback’ for public health.

Colorado’s governor says he is ‘frustrated’ with federal regulators about booster eligibility.

School nurses battle Covid-19, and angry parents.

For Terminal Patients, the Barrier to Aid in Dying Can Be a State Line

‘They See Us as the Enemy’: School Nurses Battle Covid-19, and Angry Parents

Bariatric Surgery May Lower Risk for Severe Liver Disease, New Study Finds

The Core Legal Strategy Against Opioid Companies May Be Faltering

Home Covid tests recalled over false positives reach 2 million kits.

Ten states sue the U.S. over the vaccine mandate for health care workers.

A new challenge for organ transplants: donors who had long Covid.

Pfizer Asks F.D.A. to Expand Booster Eligibility to All Adults

Oklahoma Supreme Court Throws Out $465 Million Opioid Ruling Against J.&J.

She Died With Long Covid. Should Her Organs Have Been Donated?

The Biden administration is ‘prepared to defend’ the vaccine rules for big employers, the surgeon general says.

Stephen Karpiak, Pathbreaking H.I.V. Researcher, Dies at 74

Do you have questions or concerns about vaccinations for children?

What Do You Want to Know About Kids and Vaccines?

Pfizer Says Its Antiviral Pill Is Highly Effective in Treating Covid

Young Children Receive First Dose of Covid-19 Vaccine

He Can’t Cure His Dad. But a Scientist’s Research May Help Everyone Else.

Who Can Make mRNA Vaccines?