The answers include the following:
This is defined as the process in which the pathogen causing communicable disease is transferred from an infected host to another individual or group.
The Lungs is referred to as the reservoir in the chain of transmission while the mucus from her cough is referred to as the portal of exit in transmission chain because it leaves the body of individuals through that to infect other people.
This therefore makes the aforementioned above the most appropriate choice.
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