With the Delta variant in play, federal health officials are analyzing the latest numbers to look at the frequency and seriousness of COVID-19 breakthrough infections. Will we need booster shots? And ...

The more contagious Delta variant of Covid-19 now makes up 83% of sequenced samples in the United States, US Centers for Disease Control and Prevention Director Dr. Rochelle Walensky said Tuesday.

The delta variant is fueling the COVID-19 surge in the United States, but experts warn that a more dangerous variant could emerge if more Americans don't get vaccinated. Delta is the most recent of ...

Johnson & Johnson said Thursday that new data shows that its single-shot COVID-19 vaccine provides protection against the virus for at least eight months and effectively prevents infection from ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. The Centers for Disease Control and ...

NEW YORK -- As Americans brace for the possibility of another difficult winter ahead in the nation's fight against coronavirus, there is a renewed sense of urgency to get as many people inoculated and ...

If more Americans don't get vaccinated, there is "ample chance" of another coronavirus variant emerging, one that could be more aggressive and more pervasive than the delta variant, Dr. Anthony Fauci ...

WASHINGTON -- Many of the world's richest countries have spent the past year hoarding coronavirus vaccines, buying up enough doses to vaccinate their populations several times over and consistently ...

GRAIN VALLEY, Mo. (WDAF) – A Missouri family is mourning the loss of their loved one to the Delta variant of COVID-19. They said 45-year-old Tricia Jones, a Grain Valley mother of two, was hesitant ...