Never had one in my life. Even back at grade school, my parents wrote the letter to the school admin to NOT give me the flu shot, with an “or else” clause. 4 of my classmates got sick within days, then those parents went ballistic at the school.
I’m 60. Never had one, never will, never get sick except for an occasional light cold or flu.
I worked construction my whole life so never washed hands, ate lunch with dirty hands every day.