Genetic disorders are passed down from generation to generation. Sometimes, only one parent passes down the faulty gene, which creates carriers of a genetic disease. Some carriers of certain genetic disorders have been proven to be more resistant to certain viral or infectious diseases. Although many genetic disorders can be very harmful, there can be some benefits to either being a carrier or showing full symptoms of a disease. Similarly, infection by certain pathogens will sometimes grant the sufferer resistance to other illnesses down the road.
The following diseases have been proven to promote some degree of resistance against other illnesses. Some of the virueses mentioned continue to be incurable, and studying factors that grant resistance to these pathogens can help researchers develop more effective treatment options. So here are ten diseases that prevent other diseases.