True about epidemiology of influenza -
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
Asymptomatic seen rarely
Incubation period 10-12 hrs
Pandemic rare
All ages sex are equally affected
Communicable diseases