pathogens - microorganisms that cause disease, fungi - causes atheletes foot, bacteria - causes cholera, virus - causes flu, protozoa - causes dysentery, parasite - lives on a host, vectors - carry disease but do not suffer, infectious - disease that spreads, white blood cells - help fight disease, antibodies - chemicals made by white blood cells, antibiotics - chemicals a doctor gives you to destroy bacteria, toxins - made by bacteria and viruses,

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