Vaccinated Americans May Go Without Masks in Most Places, Federal Officials Say

John Moore, a virologist at Weill Cornell Medicine in New York, said people would need to assess their own comfort in different situations, depending on the size of the gathering and the number of cases in the area.“Would I go...

Pfizer and Moderna Shots Are Powerfully Effective against Virus, Analysis Says

The Pfizer-BioNTech and Moderna coronavirus vaccines are 94 percent effective at preventing symptomatic Covid-19 illness, according to a new study of more than 1,800 health care workers in the United States.The research, which the Centers for Disease Control and Prevention...

Pfizer and Moderna vaccines are powerfully effective against the virus, a C.D.C. analysis confirmed.

The Pfizer-BioNTech and Moderna coronavirus vaccines are 94 percent effective at preventing symptomatic Covid-19 illness, according to a new study of more than 1,800 health care workers in the United States.The research, which the Centers for Disease Control and Prevention...

How the United States Beat the Variants, for Now

On Dec. 29, a National Guardsman in Colorado became the first known case in the United States of a contagious new variant of the coronavirus.The news was unsettling. The variant, called B.1.1.7, had roiled Britain, was beginning to surge in...

Businesses Offer Perks to Vaccinated Customers

At Fort Bragg, soldiers who have gotten their coronavirus vaccines can go to a gym where no masks are required, with no limits on who can work out together. Treadmills are on and zipping, unlike those in 13 other gyms...

Hundreds of Epidemiologists Expected Mask-Wearing in Public for at Least a Year

When federal health officials said on Thursday that fully vaccinated Americans no longer needed to wear masks in most places, it came as a surprise to many people in public health. It also was a stark contrast with the views...

In Survey, Epidemiologists Saw Continued Need for Masks

When federal health officials said on Thursday that fully vaccinated Americans no longer needed to wear masks in most places, it came as a surprise to many people in public health. It also was a stark contrast with the views...

Vaccinated Americans Now May Go Without Masks in Most Places, the C.D.C. said

In a sharp turnabout, federal health officials on Thursday advised that Americans who are fully vaccinated against the coronavirus may stop wearing masks or maintaining social distance in most indoor and outdoor settings, regardless of size.The advice from the Centers...

Covid Vaccines Protect Pregnant Women, Study Confirms

The vaccines produced similar responses in all three groups of women, eliciting both antibody and T-cell responses against the coronavirus, the scientists found. Of particular note, experts said, was the fact that the shots produced high levels of neutralizing antibodies,...

Vacunas para la COVID-19: ¿debo ponerme la segunda dosis?

Sin embargo, la agencia advirtió a la gente no vacunada que corre más riesgo —y debería seguir usando cubrebocas— cuando va a ver una película a un lugar cerrado, come dentro de un restaurante o bar, participa en clases de...
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