Exposure (and Vulnerability)
Exposure (and Vulnerability) : "In Order to contract infectious disease, you need to be exposed to the microbe that causes the disease. However, some people are exposed and never become ill, while others may die from the same exposure. If we call the person who is exposed a 'host', the host may have certain vulnerabilities or strengths that alter the outcome of the exposure. The host may have inherited genetic traits that limit his or her vulnerability to a certain class of microbes, or may have previous experience with the specific microbe, and thus have an immune-response system that is poised and ready to fight off the microbial invader". (Bissell 2005)
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