Some ways to strengthen your immune system is to eat healthy foods(of course), take vitamins, just some simple stuff that most people only do when they have a cold. the main type of vitamin that boost the immune system is vitamin c
It doesn't indicate a stronger system in general, just an overreaction to a specific thing.
beans
You're digestive system get stronger as exercising.
it makes your bones stronger
yes
When you exersize, your muscles get midroscopic tears in them. When these tears heal, your muscles get bigger. This is how you get stronger. The more you exersize, the stronger you Muscular system gets.
When you exercise you are using muscles of the circulatory system and respitory system, and when you use muscles, they get stronger. When muscles of a body system are stronger, the system improves.
It makes your bones stronger
it has made china stronger
stronger security
I believe that mice do have stronger immune systems than humans because of the environment they dwell in.
Fascism.