Vaccines and Immunization: What is Vaccination?

Click on the headings "How are vaccines developed and tested?" and "How does WHO help ensure vaccine safety?". (3 minutes)

WHO

Click https://www.who.int/news-room/q-a-detail/vaccines-and-immunization-what-is-vaccination?adgroupsurvey=%7Badgroupsurvey%7D&gclid=Cj0KCQjw8IaGBhCHARIsAGIRRYovj7Oel0R3WFNaUqYmEeurZy8I1xYX1TEKbn7rUd5jLwjkHNOo58caAu_aEALw_wcB link to open resource.