Cigarette Smoking as a Risk Factor for Epidemic A(H1N1) Influenza in Young Men

Abstract
We studied an outbreak of A(H1N1) influenza in an Israeli military unit of 336 healthy young men to determine the relation of cigarette smoking to the incidence of clinically apparent influenza and to the influenza-antibody response. Of 168 smokers, 68.5 per cent had influenza, as compared with 47.2 per cent of nonsmokers (P1N1) antigen were higher in smokers but not markedly so.