“When humans and Neanderthals interbred, they passed this genetic resistance to diseases on to their offspring, allowing them a better chance at survival than those without this additional resistance to disease” https://humanorigins.si.edu/evidence/genetics/ancient-dna-and-neanderthals?fbclid=IwAR22EddFHbh5IuUc9_lxSQ_-zEKbyNxHcrrIK-p_jAG6D_UCGUpw4hmz_cY