Text written in Basque and translated automatically by Elia without any subsequent editing. SEE ORIGINAL

[Animated science: from baryolization to vaccination]

in 1977, the World Health Organization declared smallpox missing after a worldwide vaccination campaign. In this video we will learn about the history of this first vaccine, starting from the baryolization of its ancestor, to the Balmis expedition that was carried out to transport it to the Americas on a transoceanic trip.