Rebirth in '79: Starting with Mutant Giant Rabbits

Cheng Yu, a legendary military doctor skilled in both medicine and martial arts, is reborn in 1979. He returns to the very day the mutant rabbit virus wiped out his village! In his previous life, the entire village perished, but he survived alone because, as a descendant of a traditional Chinese medicine family, his grandfather had bathed him in herbal toxins since childhood, making him immune to all poisons. In this rebirth, Cheng Yu vows to use his medical skills to decide life and death, and his iron will to protect the people, rising from a rural educated youth to a pillar of the nation! — Description from novelcodex.org