Can someone help me turn this sentence into a small paragraph please. ‘Genes that give use a stronger immune system so we aren't as easily susceptible to illnesses.’

There are certain genes that we have that help our immune systems. These genes help our immune system so we don’t get sick. This is very important because if our immune systems are weak then we can get sick easier and faster than most people. Weak immune systems can cause terrible illnesses.

That he feels abandoned