People of my age group don't get as sick as the younger generations. We were exposed to every germ that was around during our younger days. The only immunization required to get into school was for smallpox. There weren't any changes until the DPT serum came along. It wasn't until I was in the first grade that I got that shot. And a booster in the second. The scourge at that time was polio. The serum for that didn't come along until the late 50's. I got my injection in the late sixties when I first became pregnant with my third child. By that time the measles vaccine was available also. So I got that one at the same time.
I have never had the Flu, any childhood disease, or even a sore throat during my early school years. I have never received the Flu vaccine. It wasn't until I was in the sixth grade that I had my tonsils removed to help prevent more ear infections.
Other than when canning, we didn't live a sterile life. We wiped off the table, fridge, and other appliances in the kitchen. We used soap and hot water with the dish cloth. For stuck on dirt, Brillo was our friend. I do the same today in my own home. I make sure any of the surfaces I touch on a daily basis are clean. Not germ free. Just clean. Having spent my early years on a farm with chickens, pigs, etc., I was exposed to every kind of germ there was. Mothers of today are so germ phobic that when one comes along, their child can't fight it. My kids used some of my best spoons to dig in the back yard. And they survived it. They lived by the five second rule if their ice cream or candy fell to the ground. Much to my horror! But they survived that also. What they didn't miss out on was the Measles epidemic that hit this state really hard. My oldest child lost her vision for about a month. She had the measles in her eyes. Spike had his heart damaged and today can say he has had eight heart attacks because of the measles. My third child had her kidneys severely damaged. Until the day she died, she spent more time in the hospital than out. My fourth child had only a mild case until he was 14 y.o. He then got them a second time and it was touch and go if he would survive it. None of them had received the measles vaccine because they had already had the disease.
With four kids, I didn't have time to worry about germs. As long as the house was reasonably clean, they survived it all.