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A third US company has released study results showing its coronavirus vaccine is safe and elicits an immune response.

The calcium in our bones and teeth likely came from stars exploding in supernovas and scattering this mineral across the universe in massive quantities, according to a new study.

Covid-19 rates are significantly higher among minority children and those from lower socioeconomic backgrounds, according to a new study.

Seraphina Harrell, a little girl who received national attention because the surrogate who gave birth to her had refused to have an abortion, has died.

The global pandemic sparked a corporate work-from-home revolution — a new opportunity for many American workers who for decades have been tethered to offices, daily commutes and in-person meetings.

For a world crippled by the coronavirus, salvation hinges on a vaccine.

Critical media reporting about Operation Warp Speed, the federal government's effort to speed development of drugs, vaccines and other measures to fight the coronavirus pandemic, is distracting people working on the project, its chief adviser says.

Coronavirus is more widespread in the US than ever before, prompting White House coronavirus response coordinator Dr. Deborah Birx to say over the weekend the country has entered a "new phase" of the pandemic.

Major League Baseball is quickly becoming a cautionary tale with players and staff on at least three teams testing positive since the season resumed last month.

Parents should be alert for signs of acute flaccid myelitis or AFM, a rare paralyzing polio-like condition that affects young children, the CDC says.

President Donald Trump said the United States' staggering death toll from coronavirus "is what it is" in a new interview, again giving his administration credit for its response despite ongoing surges in new cases and a human toll that far outpaces that of any other nation.

Two new trials soon will be underway in the United States to investigate antibody treatment approaches for Covid-19 patients.

In a video for his students that went viral, an Alabama educator channeled his background in music to help his school prepare for reopening in the era of Covid-19.

Justin Hunter's senior year of high school was supposed to be major. The Atlanta area star football player was looking forward to offers from courting colleges while enjoying his final season.

Vitamin D is known as the "sunshine vitamin" because your body absorbs the nutrient primarily through exposure to the sun.

It was the kind of gift that should have come with a return slip.

As Covid-19 case counts continue to climb, schools starting up the new academic year are faced with the task of creating a safe environment for students and teachers -- even as students test positive and safety guidance shifts.

In the confusion and chaos of a global pandemic, a small but significant group of people who refuse to wear masks has emerged despite the now established evidence of their efficacy.

Cases are ticking upwards in parts of Europe, the process of unlocking is paused in the UK, and the Americas are still battling to contain vast Covid-19 outbreaks.