C. Portal of exit.

Did you know?

Did you know that the second link in the chain of transmission is the portal of exit? The chain of transmission refers to the process by which infectious diseases are spread from one person to another. The first link is the infectious agent, followed by the portal of exit, which is where the infectious agent leaves the host's body. This could include coughing, sneezing, or other bodily fluids. The portal of entry, which is the next link in the chain, is where the infectious agent enters a new host. Reservoirs, the final link, are sources where the infectious agent can survive and multiply, such as humans, animals, or environmental surfaces. Understanding this chain of transmission is crucial in preventing the spread of infectious diseases.

What is the second link in the chain of transmission?

C. Portal of exit.