True about point source epidemic is?: (A) Occurs in more than 1 incubation period, (B) Occurs in one incubation period, (C) The exposure is continuous, (D) Epidemic curve falls very slowly
Answer is B. Common source single exposure epidemics is also known as point source epidemic. The exposure to the disease agent is brief and essentially simultaneous, the resultant cases all develop within one incubation period of the disease. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 72