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Any virus or organism that causes disease.


Medicine that treats bacterial infection.

antibiotic resistance

Bacteria's ability to evolve to withstand the effects of an antibiotic.


A dead or altered virus introduced into the body to stimulate the body's production of antibodies, causing immunity to the real virus.


Proteins produced by the immune system that destroy specific pathogens.


The body's ability to destroy pathogens before they can cause disease.


Any disease easily transmitted by contact. An infectious disease.


An animal host that transfers a pathogen or a parasite to another organism


An organism that is host to a pathogen to which it is immune but can pass the pathogen on to others.


Any physical or chemical agent that can cause a mutation in DNA

infectious disease

A disease that is caused by a pathogen and that can be spread from one individual to another.


A poison produced by bacterial pathogens that damages cells.


Isolation to prevent the spread of infectious disease.

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