Do you think after a certain number of severe illnesses, you become weaker?

Definitely

That is possible but I would do everything in my power to stay strong and fit.

Definitely. It just depends on what damage the illness did. If it was severe, then there will be severe, lasting damage. The body can come back stronger sometimes, but other times, there's just too much damage.

Certain illnesses will certainly leave you weaker.

After 1 you’d be severely weakened

I think it's the opposite. Once your body has to fight to heal it builds up and becomes stronger. Some may use cancer as an example of it becoming weaker but it's the chemo that destroys you.

I don't think so. It depends on the illness, but the body adjusts. If we became weaker from general illness we wouldn't have survived as a species.

There are limits, it's up to the individual. For me, I want to come back stronger every time something hits me.

They tend to compound each other in my experience, yeah.

Yes unfortunately