(NEW YORK) -- If you have a weakened immune system, the COVID-19 vaccines may have a reduced effectiveness for you. Experts say it's still very important for you and those around you to get... Read More.
By ZOE MAGEE, ABC News(LONDON) -- Oxford University Thursday morning announced more promising news in the development of its COVID-19 vaccine. The results from Phase 2 of its AZD122 vaccine... Read More.
By JORDYN PHELPS, ABC News(WASHINGTON) -- President Donald Trump on Thursday, just days after being hospitalized for COVID-19 and as he continued to receive medical care at the White House,... Read More.
By DR. STEPHANIE E. FARBER, ABC News(NEW YORK) -- As we continue to learn more about COVID-19, one question on many people’s minds is: Why do some people get sick... Read More.
(NEW YORK) -- Measles isn't just deadly -- the disease also can cause long-term damage to a person's immune system, according to research published this week in journal Science Immunology."We have known... Read More.