21 Interesting and Little Known Facts About Vaccines

“Vaccine facts” seems to have become a surprisingly loaded term over the last couple years, but the history of vaccines is actually full of heated opinions and outlandish ideas. In this video, we drill down to just the facts about vaccination and the history of vaccines. You’ll learn about the first vaccine, what an mRNA vaccine does (and does not) do, and why anti-vaxxers are not a new phenomenon.

[Mental Floss]