Based on my childhood, I should be immune to a lot of things, not the least of them being COVID-19. I ate my fair share of Flintstones vitamins, I used to dry my hands with the communal gas station bathroom cloth towels (you know, the ones everybody and their grandmothers had used), and I took all kinds of gross cough medicines through the years. Plus, I practice the five second rule when it comes to food falling on the floor. Well, on most things.
I should be immune to EVERYTHING.