Colds, yes.

I think respiratory flu is far less common now than it was. I have had a legit case of the flu only once in my adult life. After spending 15 years teaching in a public school, I had countless colds but never caught the flu. Of course, annual flu vaccines might have helped. Those weren't available in the 70s.

Strep throat was also a very common complaint in the letters. Throat cultures, home visits from the pediatrician, etc., were frequent, especially for my brother. I haven't seen a single case of strep in my extended family since. Maybe just lucky.

Many things have improved over the decades, but we do have an array of exciting tick-borne illnesses to make up for it!