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 ...

LAS VEGAS, NEVADA -- A California couple says they were fully vaccinated, but still contracted COVID-19 while on vacation as experts say breakthrough cases are possible, especially with the delta ...

MARIN COUNTY, Calif. -- As the Delta variant spreads, we are learning more about breakthrough COVID-19 cases. Numbers from California's state health department help put into perspective what the ...

CHICAGO — Thousands of fully vaccinated people have contracted the coronavirus, but experts say these breakthrough cases are rare. “The total number of individuals who are vaccine breakthroughs is ...

Add Yahoo as a preferred source to see more of our stories on Google. As measles has spread across the United States, the overwhelming majority of cases have been among unvaccinated people or those ...

As measles has spread across the United States, the overwhelming majority of cases have been among unvaccinated people or those with unknown vaccination status. Of the 483 cases reported by the ...

With the more contagious delta variant strain of COVID-19 spreading throughout the country, hospitalizations and deaths from the virus are on the rise. According to the Centers for Disease Control and ...