Virus is a microscopic organism that lives in a cell of another living thing. Although viruses are extremely small and simple, they are a major cause of disease. Some viruses infect human beings with such diseases as measles, influenza, and the common cold.
Passive Mobs. Passive mobs are composed of creatures that will never, under any circumstances, attack the player. Some passive mobs can be bred to create more of them, e.g. pigs can be bred to effectively farm them.
Answers. 1  The only mobs that could attack you are slimes, and they only attack if you do so first. 2  No hostile mobs dont but passive mobs do and wolfs plus all hostile mobs despawn. 3  Only passive mobs such as farm animals, wild wolves, and ocalots (wild cats, unsure how to spell it) spawn in peaceful mode.