Today in class we watched a Bill Nye the Science Guy video about Germs and how they affect your body. There are three different types of germs they are Bacteria, a Virus, and Pathogen. Bacteria can have a positive or negative effect on your body, a Virus usually has a negative effect on your body, and Pathogen is a type of bacteria that causes a disease, so it has a negative effect. Your body’s first defence system fights against things that harm you and can tell whether something is negative or not. Your body’s second defence system just knows if something is negative. The anti-body attach to the germs so the white blood cells can know to attack the germs (the anti-bodies and white blood cells work together to defeat the germs).