Martha Raddatz interviews FDA Commissioner Dr. Stephen Hahn on ‘This Week.”
#ABCNews #ThisWeek #FDACommissioner #COVID19
Martha Raddatz interviews FDA Commissioner Dr. Stephen Hahn on ‘This Week.”
#ABCNews #ThisWeek #FDACommissioner #COVID19
A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins.