augmentation of hemagglutinationinhibition hi antibodies in gilts of breeding age by large dosages of human anew jersey76 influenza vaccine fifteen gilts of breeding age were studied four received three 4 ml doses three weeks apart of an experimental killed swine influenza vaccine containing aswineill65 antigen four received three ml doses three weeks apart of a human influenza vaccine containing anew jersey76 antigen and three received two doses of human influenza vaccine followed by a 3 ml third dose of experimental swine influenza vaccine all except one vaccinate responded to two doses of vaccine by the time of the third dose of vaccine hi titers were highest four weeks after the third dose of vaccine geometric mean titers were highest in animals receiving human influenza vaccine containing anew jersey76 titer profiles dropped markedly by 60 days after the third vaccination