In the chain of infection, what is the 'portal of exit'?

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Multiple Choice

In the chain of infection, what is the 'portal of exit'?

The main idea is how a pathogen leaves its source to reach another person. The portal of exit is the route the pathogen uses to leave its reservoir and reach a new host. A reservoir is where the pathogen lives—humans, animals, or the environment. The exit route can be respiratory droplets from the mouth or nose, blood or bodily fluids, feces or vomit, or through skin lesions. This is different from where the pathogen resides (the reservoir) and from how it enters the next person (portal of entry) or the body's immune response. So describing the exit path as the way the pathogen leaves the reservoir to reach a new host captures the correct concept. For example, coughing or sneezing to expel respiratory pathogens illustrates a portal of exit.

The main idea is how a pathogen leaves its source to reach another person. The portal of exit is the route the pathogen uses to leave its reservoir and reach a new host. A reservoir is where the pathogen lives—humans, animals, or the environment. The exit route can be respiratory droplets from the mouth or nose, blood or bodily fluids, feces or vomit, or through skin lesions. This is different from where the pathogen resides (the reservoir) and from how it enters the next person (portal of entry) or the body's immune response. So describing the exit path as the way the pathogen leaves the reservoir to reach a new host captures the correct concept. For example, coughing or sneezing to expel respiratory pathogens illustrates a portal of exit.

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