Update: influenza activity - United States, September 28, 2008--January 31, 2009.
From September 28, 2008, to January 31, 2009, influenza activity remained low in the United States but began to increase at the end of January. Thus far during the 2008-09 influenza season, influenza A viruses have predominated and are antigenically related to the 2008-09 influenza vaccine strains. Oseltamivir resistance has been detected in nearly all of the influenza A (H1N1) viruses tested so far during the 2008-09 season, with high levels of adamantane resistance among influenza A (H3N2) viruses. This report summarizes U.S. influenza activity since the last update and reviews interim recommendations for the use of influenza antiviral medications.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000998:Antiviral Agents / Q000494:pharmacology*; D002648:Child; D024882:Drug Resistance, Viral; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000187:drug effects* / Q000302:isolation & purification; D053122:Influenza A Virus, H3N2 Subtype / Q000187:drug effects* / Q000302:isolation & purification; D009981:Influenza B virus / Q000187:drug effects / Q000302:isolation & purification; D007251:Influenza, Human / Q000188:drug therapy* / Q000453:epidemiology*; D008875:Middle Aged; D011014:Pneumonia / Q000401:mortality; D011159:Population Surveillance; D014481:United States / Q000453:epidemiology; D055815:Young Adult
D000998:Antiviral Agents