Question: Why are some people more immune than others to disease and infection? How do we develop immunity?

Carmen Denman answered on 11 Mar 2015:

Hello 454sysb37,
Great question!
We are all different in our immune systems for various reasons. We are passed or inherit some aspects of immunity by our mothers. Other aspects of our immune system we have to ‘learn’ by being exposed to microorganisms that could make us sick. Some people might have naturally weakened immune systems due to underlying issues like diabetes, or some sort of genetic disease that impacts immune cell function. It does vary even from healthy person to healthy person- for different lifestyle choices can impact our overall health and therefore our immune systems.