How would exercising, sleeping well, eating healthy foods, and receiving recommended vaccines affect a person's immunity?

A person may become ill from having so many vaccines that the immune systems will begin to fail.

The stress on the body from exercise would cause a decrease in a person's ability to fight infectious pathogens.

Only vaccinations will help boost the person's immune system.

The body will be able to produce the antibodies and memory cells needed to fight disease and recover quickly.