Surveillance for avian influenza continues.
D000818:Animals; D002645:Chickens / Q000821:virology; D002681:China; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification*; D005585:Influenza in Birds / Q000821:virology; D007251:Influenza, Human / Q000821:virology*; D011159:Population Surveillance; D014944:World Health Organization