True about epidemiology of influenza -: (A) Asymptomatic seen rarely, (B) Incubation period 10-12 hrs, (C) Pandemic rare, (D) All ages sex are equally affected
Answer is D. Influenza is characterised by sudden onset of chills,malaise, fever, muscular pains and cough Influenza A strain is pandemic IP period l8 to 72 hours Affects all ages andboth sexes Reference : Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 163,164