Question

select the correct answer.
chickenpox is a virus that was common in children, and there are still many cases of the virus each year. christopher caught chickenpox after spending time with another person that had the virus. the chickenpox represents what link in the chain of transmission in this scenario?
a. susceptible host
b. infectious agent
c. mode of transmission
d. portal of entry
e. reservoir

Explanation:

To determine the link of chickenpox in the chain of transmission, we analyze each option:

• Option A: A susceptible host is a person (or organism) who can get infected. Christopher is the susceptible host here, not the chickenpox virus.
• Option B: An infectious agent is the pathogen (like a virus, bacteria, etc.) that causes the disease. Chickenpox is caused by the varicella - zoster virus, so the chickenpox virus (referred to as chickenpox in the context) is the infectious agent.
• Option C: Mode of transmission is how the infectious agent is passed (e.g., airborne, contact). The virus itself is not the mode.
• Option D: Portal of entry is the way the infectious agent enters the host (e.g., respiratory tract, skin). The virus is not a portal of entry.
• Option E: A reservoir is where the infectious agent lives and multiplies (e.g., an infected person, animal). The virus is not a reservoir (the infected person is the reservoir).

Answer:

B. Infectious agent