Which time period is an example of latency?

• A. The incubation period after exposure
• B. The symptomatic phase before latency
• C. Between chickenpox and developing shingles
• D. Recovery period after infection

Answer: (C)

Latency is a period when a pathogen persists in the body in a dormant state, not actively replicating or causing symptoms. For varicella-zoster virus, the primary infection causes chickenpox, and after recovery the virus retreats to nerve cells and remains dormant there. That dormant phase is latency. Later, the virus can reactivate and cause shingles, showing how latency sits between the initial illness and later reactivation.

This differs from the incubation period, which is the time from exposure to the onset of symptoms; during incubation, the virus may be developing but you haven’t started showing symptoms yet, so it’s not a dormant latent state. The symptomatic phase before latency would involve active illness, not dormancy. The recovery period is simply the healing phase after illness, not a dormant persistence of the virus.