Coronavirus Vaccine

The 37-page study showed participants who reported being vaccinated were at substantially reduced risk of testing positive for COVID-19 compared with those who reported not being vaccinated.

Secretary of Defense Lloyd Austin is expected Friday to announce a mandatory vaccine policy for all active-duty forces in the U.S. military.

Houston Mayor Sylvester Turner is the most recent official to defy the governor’s order. He announced Monday that the city’s nearly 22,000 city employees will be required to mask up inside city buildings where social distancing is not doable.

The Biden administration is taking the first steps toward requiring nearly all foreign visitors to the U.S. to be vaccinated for the coronavirus, a White House official says.

WHO officials have described the lambda variant as a “variant of interest,” but researchers say more studies are needed to understand its potential impact.

On Aug. 3, the U.S. recorded 127,976 new daily cases and on Aug. 4, the country counted 106,557 new daily COVID-19 cases.

WHO Director-General Tedros Adhanom Ghebreyesus made the appeal mostly to wealthier countries that have far outpaced the developing world in numbers of vaccinations.

A hospital shared lung X-rays of vaccinated and unvaccinated COVID-19 patients in an effort to show the vaccine’s effectiveness at preventing severe illness.

COVID-19 cases, hospitalizations and vaccine rates are all increasing amid the spread of the delta variant. Here are some answers to common questions about the variant and the vaccines.

Offspring drummer Pete Parada announced Tuesday he would not be touring with the band because he will not be taking a COVID-19 vaccine.

AstraZeneca said its COVID vaccine study found a slightly increased clot risk after the first dose and no increased risk after receiving the second.

President Joe Biden called the COVID-19 pandemic “largely preventable,” saying Americans need to get vaccinated as the delta variant fuels case surges across the country.

The U.S. Department of Defense would like Pfizer, Inc. to produce and distribute 500 million COVID-19 vaccines internationally.

Recent data from the CDC shows that less than 1% of breakthrough COVID-19 cases have led to hospitalization — and the percentage is even smaller for breakthrough COVID-19 cases that led to to death.

The city of Denver says city workers and private-sector employees in “high risk” areas must get vaccinated for the novel coronavirus by Sept. 30.

The CDC says 70% of American adults have now received at least one vaccine dose of a COVID-19 vaccine, as the country faces a new surge fueled by the delta variant.

The Oklahoma Republican Party faced fierce criticism for a Facebook post likening COVID-19 vaccine mandates to the persecution of Jewish people in Nazi Germany.

As COVID-19 vaccination rates have stalled in the U.S. and talk of mandates spreads, here’s a look back at the history of vaccine mandates in the country and how the Supreme Court has routinely defended states’ rights to enforce them.

An internal Centers for Disease Control and Prevention document obtained by several news outlets warns that the COVID-19 delta variant could be more likely to produce severe illness and can spread as fast as chickenpox.