Mutations Extended
Other mutations you might see are more simplistic. In that, some have a mutation in their genes that allow them to be unable to contract HIV/AIDS, Malaria, or another virus/infection. Other mutations have allowed people to have low cholesterol in spite of their diet as well as have little need for sleep.
These types of mutations are not uncommon, yet some things might come off as mutations when they are actually different evolutionary responses. People with mutations like this can play an important role in science, as they can help us develop cures for major illnesses as well as vaccines.