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condition produced when an infective agent becomes established in or on a suitable host; infections usually have signs and symptoms
contagious viral disease which has a sudden onset, fever and severe aches and pains
viruses, bacteria, or fungi that can not be seen with the naked eye; also called germs
portal of exit
a route taken by microorganisms leaving the body, such as blood or the natural openings of the body
transmission of infection by an intermediate object, such as food, water, medical equipment, or a person's hands, into the portal of entry of a susceptible host
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