You may have a weak immune system.
Different people have different immune systems.
Our immune system is how we fight off infections and germs and cancer. Sometimes the immune system does not work properly, as with immunodeficiency disorders. These people are extremely susceptible to infection and cancer. There are natural ways we can strengthen our immune system. Many people like to think they can function just fine on 5 to 7 hours a night, but the truth is, we require at least 8 to 10 hours per night.