High dose influenza vaccine was more immunogenic than standard dose influenza vaccine in children and young adults with leukemia or solid tumor, but not with HIV.
High dose influenza vaccine was safe and well-tolerated in children and young adults with leukemia, solid tumor, or HIV.
Two doses of influenza vaccine were more immunogenic than one dose, especially against H1 and B antigens, in children and young adults with leukemia or solid tumor, but not with HIV.