While some families in the US are concerned about the potential effects of taking a vaccine, others are exploiting fears by spreading misinformation online. CNN’s Elizabeth Cohen speaks with vaccine advocate Chelsea Clinton about the battle for facts. #CNN #News
In This Story: Vaccine
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.