ANTIGENIC  VARIATION OF RECENTLY ISOLATED A2 INFLUENZA VIRUSES.
D000940:Antigenic Variation; D000941:Antigens; D006382:Hemadsorption; D006383:Hemadsorption Inhibition Tests; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human; D007564:Japan; D009500:Neutralization Tests; D009975:Orthomyxoviridae; D012698:Serologic Tests; D014481:United States; D014612:Vaccines
D000941:Antigens; D007252:Influenza Vaccines; D014612:Vaccines
ANTIGENS; HEMADSORPTION-INHIBITION TESTS; HEMAGGLUTINATION INHIBITION TESTS; INFLUENZA VIRUSES; INFLUENZA, ASIAN; JAPAN; NEUTRALIZATION TESTS; SERODIAGNOSIS; UNITED STATES; VACCINES