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 ...

A vial of the measles, mumps and rubella vaccine is on display at the Lubbock Health Department Wednesday, Feb. 26, 2025, in Lubbock, Texas. Mary Conlon / AP While the measles vaccine is highly ...

A dose of the measles vaccine at a health center in Lubbock, Texas, on Feb. 27. More than 800 people in the U.S. have had measles since the beginning of the year, according to NBC News data. The ...

Breakthrough infections (infections after vaccination) by new variants of SARS-CoV-2 are common, despite the extensive immunization programs against SARS-CoV-2. Recent research suggests that human ...

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 ...

Covid-19 vaccines are very effective against preventing infection, but no vaccine is 100% effective. Fully vaccinated people can and do become infected. It's not known exactly how many of these ...

In most cases, a "breakthrough" means a sudden, dramatic or important discovery. With Covid-19, however, the expression has been used to describe an infection that "broke" through the protective ...

More than 800 people in the U.S. have had measles since the beginning of the year, according to NBC News data. The majority of cases are in West Texas, where an outbreak that shows no signs of abating ...

LA JOLLA, CA—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 ...