[State of herd immunity to B influenza].
D000293:Adolescent; D000328:Adult; D000914:Antibodies, Viral / Q000032:analysis*; D006801:Humans; D007564:Japan; D009975:Orthomyxoviridae / Q000276:immunology*; D014586:USSR
D000914:Antibodies, Viral
Sostoianie kollektivnogo immuniteta k grippu B