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A new study compares the decline in effectiveness against infection of the three COVID-19 vaccine brands available in the U.S. The vaccines declined in effectiveness significantly after six months.
 

As tens of millions who are eligible in the United States consider signing up for a Covid-19 booster shot, a growing body of early global research shows that the vaccines authorized in the United States remain highly protective against the disease’s worst outcomes over time, with some exceptions among older people and those with weakened immune systems.
 

A new surge of Covid-19 cases is expected to start hitting the United States around Thanksgiving just as the holiday season begins, public health experts are warning.
 

The U.S. says that it’s inviting the global community to visit now that the government has ended the ban on travelers from 33 countries.
 

COVID-19 booster shots are now available for certain fully vaccinated people after evidence revealed the initial series of shots — two doses for the Pfizer and Moderna vaccines, and one dose for the Johnson & Johnson vaccine — appear less effective against the delta variant as protection wanes over time.
 

Waves of Covid can give you an awful sense of déjà vu. As “Hot Vax Summer” gave way early to Delta-anxious fall, you could be forgiven for feeling a familiar sense of dread, not so different from what you’d felt before the dismal winter of 2020 or the Southern surge that took off that July.
 

A first COVID shot will give kids some protection, but none of them will be fully vaccinated until the beginning of December.
 

By January 4, all U.S. businesses with 100 or more employees will need to either instate a mandatory Covid vaccine policy or require that all unvaccinated employees wear a mask at work while getting tested for Covid regularly, according to a new Occupational Safety and Health Administration order on Thursday.
 

For many families, the approaching end-of-year holidays will mean not only navigating the return of crowded airports and packed roads, but also scheduling vaccinations for children 5 to 11 years old who are now eligible for coronavirus vaccine shots.
 

If you got a Johnson & Johnson COVID-19 vaccine for your initial series and specifically want the Moderna, get the half-dose.
 

Increased blood pressure, blood clots, myocarditis and heart attacks are all associated risks for the flu virus.
 

As the U.S. opens up while still in the midst of a pandemic, this winter is likely to see the return of colds and the flu, along with continuing COVID-19 cases. The symptoms we once may have glossed over now could indicate something worse – which isn't the most comforting concept.