[Retric]

Penicillin and plenty of others sure, but it’s a huge list and resistance has long been fought via the use of novel antibiotics: https://en.wikipedia.org/wiki/Timeline_of_antibiotics

USSR’s issues where generally more economic than technological. However, they did lag behind the curve in introducing new antibiotics. https://en.wikipedia.org/wiki/Economy_of_the_Soviet_Union#/m...