2) Consider a group of humans all exposed to pathogens (i.e., the same disease-c

Question

2) Consider a group of humans all exposed to pathogens (i.e., the same disease-causing organism, but presumably a population of such!) Examples might be a group of people eating at a restaurant, or all exposed to a respiratory pathogen in a shopping mall, classroom, or on an airplane, etc.

a) Would everyone come down with the illness? Why or why not?

b) If not, how would you explain the variability in response in terms of 1) differences attributable to pathogens and 2) differences attributable to humans?

Explanation / Answer

a) Everyone will not come down with illness.Some will.have the illness while some will be fine. This is becuse some people are already immune to that pathogen so they will fight against it while some are not immune to that pathogen so they will show the symptoms.

b)1. Pathogen might have lost its virulence factors while fighting with the immune system of the person as a resukt of which that person does not have the disease. While the case is just opposite for those showing illness.

2) Some people are immunocompromised and hence pathogen can affect their immune system so badly that it can lead to death.While some peole have so active immune syatem that their memory cells can remember the first encounter and fight back in second or consecutive encounters with that particular pathogen.Or the person might have developed resistance for that particular pathogen.

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