For infection to occur, each of the following conditions must be present EXCEPT one. Which one is the EXCEPTION?

Question

Quizplus · Accepted Answer

The presence of an acceptable barrier would actually prevent infection from occurring, so it is the exception to the other three conditions that are necessary for infection to occur. An appropriate portal of entry allows the pathogen to enter the host's body, a pathogen is the infectious agent that can cause disease, and a susceptible host has a weakened immune system or other factors that make them vulnerable to infection.

For Infection to Occur, Each of the Following Conditions Must