Pharmaceutical officials testify on the current development of coronavirus vaccines in front of the House Energy and Commerce Oversight and Investigations Subcommittee. Read more: https://wapo.st/2CoW0Xh. Subscribe to The Washington Post on YouTube: https://wapo.st/2QOdcqK
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.