When I was a young boy I would get sick pretty regularly (headaches, fever, nausea, the works). Now that I’m a grown man I rarely experience such extremes. Instead I find myself in more of a long term state of vague apathy and shittiness.
That makes me wonder if my immune system truly has improved, or if I simply lost touch with my feelings.
Speak for yourself, I’ve noticed being sick a lot more as an adult. That said, between vaccines and just generally not dying to diseases, we do gain some immunities throughout childhood, which serve us well through our adult lives. As adults, we likely also spend less time among lots of people, as school children do. Goodness know that the start of school always ushers in a host of illnesses as the kids return to the ~petri dish~ school. So, I wouldn’t be surprised if you’ve noticed a drop off in illnesses. If you don’t have kids and don’t hang around lots of other people on a regular basis, you may not get sick as much. With a built up immune system, said illnesses probably aren’t as bad either.