Diseases, Conditions, Syndromes

Pfizer says third shot of vaccine boosts COVID protection

New data show that protection from both doses of the Pfizer COVID-19 vaccine decreases slightly over time, but that a third dose significantly boosts levels of antibodies against several variants of the virus, including the ...

Diseases, Conditions, Syndromes

New CDC guidelines set off rush to reimpose mask mandates

New guidance from the federal government set off a cascade of mask rules across the nation Wednesday as cities, states, schools and businesses raced to restore mandates and others pushed back against the guidelines at a time ...

Diseases, Conditions, Syndromes

As variant rises, vaccine plan targets 'movable middle'

Thrown off-stride to reach its COVID-19 vaccination goal, the Biden administration is sending A-list officials across the country, devising ads for niche markets and enlisting community organizers to persuade unvaccinated ...

Diseases, Conditions, Syndromes

COVID testing's value shrinks as vaccines beat back virus

Federal health officials' new, more relaxed recommendations on masks have all but eclipsed another major change in guidance from the government: Fully vaccinated Americans can largely skip getting tested for the coronavirus.

Diseases, Conditions, Syndromes

What do the new CDC mask guidelines mean?

If you're fully vaccinated, federal health officials now say that you can take your mask off in most places—even indoors.

Vaccination

EXPLAINER: How activists target CDC vaccine tracking system

Once, getting vaccinated was all but routine. But since the heightened public awareness around the new COVID-19 vaccines, it's a different story. Now, it means check-ins with family and friends about possible arm soreness ...

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