While investigating an epidemic, search for more cases is continued till what period: (A) Twice the incubation period of the disease since occurrence of the last case, (B) Thrice the incubation period for the disease since occurrence of the case, (C) The longest incubation period for the disease, (D) Incubation period period for the disease plus two standard detions
Answer is A. while investigating an epidemic,search for more number of cases is continued till twice the incubation period since the onset of the disease as well as its progression in course of timeref;parks tectbook,ed22,pg 123