A person with weak immunity is a susceptible host for infectious agents.

A person cannot become a reservoir of infectious agent.

The route of exit is where the infectious agents get into the person's body.

Sneezing without covering the nose or mouth can spread the influenza virus.

It is another term for an infectious agent.

This refers to the resistance to get sick due to natural disease-fighting elements inside the body.

These are living things that become reservoirs of an infected agent.

It is a treatment that will boost one's immunity.

These are non living things that serve as reservoirs of infectious agents.