As the United States continues on a path to near pre-pandemic normalcy, experts remain concerned over low vaccination rates and the spread of Covid -19 variants, which could potentially exacerbate a pandemic that has upended life for more than a year and inflicted a damaging toll on American…

With the odds stacked against the US reaching the target of 70% of adults at least partially vaccinated by July 4 -- a goal set by President Joe Biden -- a vaccine expert said time is running out to get ahead of the potential spread of Covid-19 variants.

The country continued this week on a path to reopening from the COVID-19 pandemic, with major population centers such as New York and California pulling back on restrictions following increased vaccinations and lowered infections.

As US states lift more coronavirus restrictions, experts are worried people who aren't fully vaccinated could contribute to further spread of the virus.

NEW YORK — A new analysis of blood samples from 24,000 Americans taken early last year is the latest and largest study to suggest that the new coronavirus popped up in the U.S. in December 2019 — weeks before cases were first recognized by health officials.

Jerry Ramos spent his final days in a California hospital, hooked to an oxygen machine with blood clots in his lungs from COVID-19, his 3-year-old daughter in his thoughts.

After more than a year of meeting on Zoom every month, the members of Amy Ettinger’s book club recently tried something radical: They got together in real life.

Vaccine maker Novavax said Monday its COVID-19 shot was highly effective against the disease and also protected against variants in a large study in the U.S. and Mexico, potentially offering the world yet another weapon against the virus at a time when developing countries are desperate for doses.

The American biotechnology company Novavax announced on Monday that its coronavirus vaccine candidate was found to have an overall efficacy of 90.4% in a Phase 3 trial conducted across the United States and Mexico.

JACKSON, Miss. — New COVID-19 cases are declining across most of the country, even in some states with vaccine-hesitant populations. But almost all states bucking that trend have lower-than-average vaccination rates, and experts warn that relief from the pandemic could be fleeting in regions…

Fully vaccinated people who travel by public transportation no longer need to wear masks in places like outdoor waiting areas or open-air seating, the US Centers for Disease Control and Prevention (CDC) said Thursday.

WASHINGTON — Johnson & Johnson said Thursday that U.S. regulators extended the expiration date on millions of doses of its COVID-19 vaccine by six weeks.

About two dozen states have decided to scale back their daily tracking of COVID-19 cases, hospitalizations and deaths as President Joe Biden's administration and other federal officials continue trying to get more Americans -- and the rest of the world -- vaccinated.

Vaccine advisers to the US Centers for Disease Control and Prevention say there has been a higher-than-expected number of cases of a heart ailment among young people, most often males, who've recently received their second doses of the Pfizer and Moderna COVID-19 vaccines. The CDC says the r…

The Pennsylvania House of Representatives voted to terminate the commonwealth’s disaster declaration, part of an ongoing GOP effort to peel back pandemic measures put in place by Gov. Tom Wolf.

People who have been vaccinated against coronavirus, if they do become infected, have milder Covid-19 illness than unvaccinated people, a new US Centers for Disease Control and Prevention study shows.

A financial incentive has been launched with the goal of motivating Philadelphia residents to be vaccinated against COVID-19.

With her three teenagers vaccinated against COVID-19, Aja Purnell-Mitchell left it up to them to decide whether to go back to school during summer break.

President Biden announced a raft of new private-sector initiatives on Wednesday to encourage Americans to get vaccinated, as his administration increasingly looks to outside partners to help meet its goal of 70% of adult Americans with at least one shot of a coronavirus vaccine by the Fourth…