Diseases are usually caused by poisons and pathogens like harmful bacteria. A healthy body, which has a functional immune system, is usually able to deal with poisons and pathogens, so you need to first be poisoned to the point where it compromises the immune system and overwhelms the body.
Diseases are usually caused by poisons and pathogens like harmful bacteria. A healthy body, which has a functional immune system, is usually able to deal with poisons and pathogens, so you need to first be poisoned to the point where it compromises the immune system and overwhelms the body.