Should be thanking the 300 million plus dead that came before you
Most on this board can probably thank an ancestor that survived the Black Plague that killed 1/3 of the European population and an estimated 75 to 200 million between Asia and North Africa. These pandemics have been circulating around the world since we stopped being hunter gatherers and established farms and large population centers with trade from land and sea. Those who survived the reoccurring rounds of pandemics passed along a stronger immune system. On the flip side when we arrived in the new world, we were basically a biological weapon from the time we stepped off the boats.