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Demand Surges for Deworming Drug for Covid, Despite No Evidence It Works

Second Dose of J. & J. Vaccine Gives Strong Boost, Company Reports

Second Dose of J. & J. Vaccine Gives Strong Boost, Company Reports

The World Health Organization is testing three more drugs in a broad search for Covid treatments.

Citing New Data, Pfizer Outlines Case for Booster Shots

The Beta Variant: What Scientists Know

Cleveland Clinic Says It Won’t Administer Aduhelm to Patients

Citing the Delta Variant, Pfizer Will Pursue Booster Shots and a New Vaccine

In a Reversal, F.D.A. Calls for Limits on Who Gets Alzheimer’s Drug

Johnson & Johnson Vaccine Protects Against Delta Variant, Company Reports

Three Studies, One Result: Vaccines Point the Way Out of the Pandemic

Mixing Pfizer and AstraZeneca vaccines provides strong protection, according to a preliminary study.

New Therapy for Aggressive Prostate Cancer Improves Survival

Many Alzheimer’s Experts Say Use of Aduhelm Should Be Sharply Limited

Wondering if the Vaccine Worked? Get the Right Test, at the Right Time

Wondering if the Vaccine Worked? Get the Right Test, at the Right Time

A Pill to Treat Covid-19? The U.S. Is Betting on It.

CureVac’s mRNA vaccine reaches an efficacy level of just 47 percent in a clinical trial.

CureVac’s mRNA vaccine reaches an efficacy level of just 47 percent in a clinical trial.

Novavax Offers U.S. a Fourth Strong Covid-19 Vaccine