New research from scientists at La Jolla Institute for Immunology (LJI) suggests people who received COVID-19 vaccines and then experienced "breakthrough" infections are especially well armed against ...

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 ...

New research findings provide solid evidence that annual COVID-19 vaccine booster doses continue to be advisable for certain immunocompromised people, researchers at McGill University say. Published ...

A new COVID-19 variant, RF.5, has been detected in India, with cases reported across eight states and four deaths in Andhra ...

More than 99.99% of people fully vaccinated against Covid-19 have not had a breakthrough case resulting in hospitalization or death, according to the latest data from the US Centers for Disease ...

A growing proportion of COVID-19 deaths are occurring among the vaccinated, a new ABC News analysis of federal data shows. In August of 2021, about 18.9% of COVID-19 deaths occurred among the ...

Researchers discovered that people who experienced symptomatic breakthrough infections develop T cells that are better at recognizing and targeting SARS-CoV-2, including the Omicron and Delta variants ...

The CDC keeps stressing Covid-19 vaccine shots are the best way to beat the Covid-19 pandemic. More than 99.99% of people fully vaccinated against Covid-19 have not had a breakthrough case resulting ...