3 ms·
The Salk vaccine was developed in the 1950s: * https://en.wikipedia.org/wiki/Polio_vaccine https://en.wikipedia.org/wiki/Polio_vaccine
by throw0101d 2y ago
The Salk vaccine was developed in the 1950s:
* https://en.wikipedia.org/wiki/Polio_vaccine https://en.wikipedia.org/wiki/Polio_vaccine