Question

The time interval between receipt of infection and the point of maximum infectivity of the host is known as?

• A. Incubation period
• B. Serial interval
• C. Generation time
• D. Communicable period

Hint:

It is the transmission interval that roughly equals the incubation period.

Answer 1

The Correct Option is C

Step 1: Break the definition into two events: event A is the host catching the infection, event B is the host being at the peak of spreading it. The named interval between A and B is what we want.

Step 2: Epidemiology calls this the generation time. It is a transmission-based measure focused on infectiousness, and in practice it approximates the incubation period.

Step 3: Eliminate the others by their own definitions. Incubation period ends at symptom onset, not at maximum spread. Serial interval is measured from symptom onset in one case to symptom onset in the next, so it links clinical events, not infection to peak infectivity. Communicable period is a duration of infectiousness rather than the moment of greatest infectivity.

Step 4: So the matching term is the one tied to receipt of infection through to maximal infectivity.

\[\boxed{\text{Generation time}}\]