George assisting with a science challenge. Room10

George learnt how infectious diseases can spread quickly when people share body fluids.Tiny organisms are carried when sneezing or coughing.Our body tries to protect us either with acid in our stomach,mucus in our lungs or scabs on our skin.If the microbes get past our natural barriers Our body uses white blood cells to attack the infection.It's a good idea to imunise non-infected people and/or quarantine infected people.