When European explorers and travelers spread out, they brought with them the germs that they had become essentially immune to, that they had learned how to tolerate over hundreds and hundreds of years, thousands of years, of living with domesticated animals who were the sources of those pathogens.
유럽인 탐험가와 여행자가 퍼져나갔을 때 그들은 이미 면역이 된 세균을 같이 가지고 갔습니다. 그들은 수백년 수천년 동안, 병균의 근원인 가축들과 같이 살면서 저항력을 키웠죠.