english: 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.
non_english: Ko so se evropski raziskovalci in pustolovci odpravili v tuje dežele, so s seboj prinesli mikrobe, na katere so bili imuni in na katere so se privadili skozi stoletja, tisočletja življenja ob domačih živalih, ki so izvor takih mikroorganizmov.