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, ...

Two healthcare workers get COVID-19 vaccinations on the same day. Both show strong antibody responses initially, but six months later one stays healthy while the other contracts the virus. A new study ...

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 ...

Coronavirus infections are on the rise again in the United States. While more than 99% of deaths are among those unvaccinated, anecdotal reports abound of breakthrough infections, or cases of fully ...