CORRECT answer is Viruses. Viruses, an infectious agents of small size and simple structure that can multiply only in living cells of animals, plants, or bacteria.The name is from a Latin WORD meaning “slimy liquid” or “poison”.The word “hepatitis” actually means “inflammation” of the liver. Thus, “hepatitis B” refers to inflammation of the liver caused by the hepatitis B virus.Hepatitis B is spread when blood, semen, or other body fluids from a person infected with the virus ENTERS the body of someone who is not infected. PathogensDiseasesBacteriaCholera, Leprosy, Tuberculosis, etcProtozoaKala Azar, African SLEEPING Sickness, amoebic dysentery, and malaria.FungiRingworm, Skin infection