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 ...

LOS ANGELES (CNS) -- Saying the numbers highlight the safety and effectiveness of COVID-19 vaccines, Los Angeles County's public health director said the county has identified just 933 "breakthrough'' ...

COVID-19 infections and hospitalizations in the U.S. are on the rise as the highly contagious delta variant spreads, driven by the least vaccinated parts of the country. And while no vaccine is ...

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 ...

Pennsylvania’s health department is not keeping count of all breakthrough COVID-19 cases — those that occur among vaccinated residents. That means a lack of real-world data to demonstrate vaccine ...

In the early days of the coronavirus vaccine rollout, scientists were hopeful it might herald the long-awaited turning point of the pandemic, not only bringing the threat of severe disease, ...

Preliminary research shows fully vaccinated people who’ve contracted a breakthrough COVID-19 infection have strong protection, indicating they don’t need to rush to get a booster dose, The Wall Street ...

Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. At a recent town hall meeting in Cincinnati, Ohio, President Joe Biden was asked about COVID-19 ...

We'll have the latest news on the fight against the coronavirus in Tennessee below — as always, for free, because we want to share this vital information with our community. To support our mission, ...