Clinical trials have repeatedly failed to show that the drug is effective against the virus. Still, U.S. demand is high.
Tag: Clinical Trials
An Experimental H.I.V. Vaccine Fails in Africa
Researchers ended a large trial in South Africa after finding that an experimental vaccine offered little protection.
Britain will extend vaccination to 16- and 17-year-olds.
The nation, which has not been vaccinating young people without underlying conditions, altered its approach after balancing “potential benefits and harms.”
Covid Is Especially Risky for People With H.I.V., Large Study Finds
An H.I.V. infection increases the odds of dying from Covid-19 by at least 30 percent, researchers said.
Citing the Delta Variant, Pfizer Will Pursue Booster Shots and a New Vaccine
Scientists were critical of the announcement, pointing to evidence that the current two-dose regimen is powerfully effective against the coronavirus.
Should People With Immune Problems Get Third Vaccine Doses?
France is handing out third shots of the two-dose vaccines to cancer patients and others with immune system impairments. In the United States, patients like these are on their own.
Johnson & Johnson Vaccine Protects Against Delta Variant, Company Reports
The vaccine also produced long-lasting immune responses, researchers said. Booster shots seem unnecessary, at least for now.
Three Studies, One Result: Coronavirus Vaccines Point the Way Out of the Pandemic
New scientific research underscores the effectiveness of vaccines and their versatility in the fight against the coronavirus.
Mixing Pfizer, AstraZeneca Vaccines Gives Strong Covid Protection, Study Finds
Administering a first dose of one vaccine and a second dose of the other, in either order, is likely to provide potent protection, the researchers said.
AstraZeneca Booster Shot Lifts Immune Response, Study Finds
A third shot of the vaccine lifted immune response in volunteers who had already received two.