The 'generation time' in infectious disease epidemiology is best defined as:
- A Time from exposure of a susceptible host to onset of symptoms
- B Duration of the infectious period of the host
- C Average interval between infection in a primary case and infection of a secondary case that the primary case generates ✓
- D Time required for doubling of the epidemic curve
Correct answer: C. Average interval between infection in a primary case and infection of a secondary case that the primary case generates
Explanation
Generation time (also called serial interval as a proxy when onset dates are used) is the mean time from infection of a primary case to infection of the secondary cases it generates. This is distinct from the incubation period (exposure to symptom onset). The generation time, along with the basic reproduction number (R0), determines epidemic growth rates and is crucial for modeling interventions like vaccination thresholds.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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