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The chain of infection describes the situations that lead to acquiring a pathogen. The links are: infectious agent, reservoir, portal of exit from the reservoir, mode of transmission, and portal of entry into a susceptible host.

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12y ago
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10y ago

infectious agent: varicella zoster virus

reservoir: humans and a few other primates

portal of exit from the reservoir: droplets from coughing or sneezing, fluid from blisters and sores

mode of transmission: airborne or direct contact

portal of entry into a susceptible host: upper respiratory mucosa

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8y ago

There is none as cancer is not an infectious disease. Some forms of cancer, though not all, may be caused by infections agents.

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Q: What make up the chain of infection?
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