Protection declines dramatically over time for all three COVID-19 vaccines: study
By
Amy Novotney
Nov 08, 2021
As the delta variant became the dominant strain of coronavirus across the United States, all three COVID-19 vaccines available to Americans lost some of their protective power, with vaccine efficacy among...
Older adults who have received J&J need not be concerned: expert
By
Amy Novotney
Apr 20, 2021
Joshua Sharfstein, M.D., vice dean for public health practice and community engagement at Johns Hopkins University, has a message for older adults who have received the Johnson & Johnson COVID-19 vaccine:...