Local vaccine trial sites are recruiting young children to test COVID-19 bivalent doses more than two months after the vaccines were authorized for use in adults, teens, and older children.

Moderna said on Monday its updated Covid-19 booster generated "significantly higher" neutralizing antibodies against the Omicron BA.4/BA.5 subvariants than its earlier shot.

Covid-19 hospitalizations are rising among babies under 6 months old, and the U.S. Centers for Disease Control and Prevention is urging mothers to get vaccinated to reduce the risk of infection in those not yet eligible for shots, Director Rochelle Walensky said.

High blood pressure is a known risk factor for a bout of Covid-19 severe enough to raise the specter of hospitalization and death. In fact, research has shown having high blood pressure doubles the risk of having a severe case of Covid, even if you are fully vaccinated and boosted.

Paxlovid, the antiviral pill that reduces the risk of hospitalization and death from Covid-19, also reduces the risk of long Covid, according to a new study by researchers at the US Department of Veterans Affairs.

People of color -- especially Black and Hispanic people -- were less likely to receive Paxlovid and other Covid-19 treatments, according to a study published Thursday by the US Centers for Disease Control and Prevention.

For nearly two decades, Kristin Friberg has been a librarian with the Princeton Public Library in New Jersey, where one of her many roles is to lead local book groups. When the Covid-19 pandemic hit, she worried about the book club participants who had become friends over the years and the l…

 The updated Covid-19 booster shots appear to work about as well against the BA.4 and BA.5 Omicron subvariants as the original boosters they replaced, according to two new studies from research teams at Harvard and Columbia universities.

WASHINGTON — COVID-19 drove a dramatic increase in the number of women who died from pregnancy or childbirth complications in the U.S. last year, a crisis that has disproportionately claimed Black and Hispanic women as victims, according to a government report released Wednesday.

Covid-19 vaccines will be part of recommended immunization schedules in 2023 for both children and adults, after a unanimous vote by the US Centers for Disease Control and Prevention's independent Advisory Committee on Immunization Practices.

Novavax's Covid-19 vaccine is now available in the United States for use as a first booster dose for people 18 and older.

Covid-19 patients with a history of cardiovascular disease are at an increased risk of developing severe illness and could benefit most from the Covid-19 treatment Paxlovid -- but there's a catch.

The US Food and Drug Administration on Wednesday gave emergency use authorization to updated Covid-19 boosters for children as young as 5.

Younger children could soon be eligible to receive an updated Covid-19 booster shot.

U.S. health officials say 4.4 million Americans have rolled up their sleeves for the updated COVID-19 booster shot. The Centers for Disease Control and Prevention posted the count Thursday as public health experts bemoaned President Joe Biden’s recent remark that “the pandemic is over.”

President Joe Biden lit a firestorm of controversy this week when he said in an interview that "the pandemic is over": Is it really over? How do we know? Who gets to decide?

The federal government is releasing millions of Moderna booster shots that were delayed by the Food and Drug Administration as a result of a safety inspection at an Indiana packaging plant, even as states report shortages and encourage patients to use Pfizer boosters instead.

Even as the US prepares for a potential winter surge of Covid-19, President Biden roamed the cavernous halls of the Detroit Auto Show for an interview on CBS's "60 Minutes" and, gesturing to the mostly maskless attendees, told the nation, "the pandemic is over."

President Joe Biden’s top medical adviser warned in an interview with the Financial Times that a broad refusal of vaccines against COVID-19 may undermine efforts to immunize children and contain future illness outbreaks.