What Types of Germs Are There? Germs are found all over the world, in all kinds of places. The four major types of germs are: bacteria, viruses, fungi, and protozoa. They can invade plants, animals, and people, and sometimes they make us sick.   Bacteria (say: BAK-teer-ee-uh) are tiny, one-celled creatures that get nutrients from … Continue reading What Types of Germs Are There? Learn about Germs