Handle with care.
D000818:Animals; D002681:China; D005818:Genetic Engineering / Q000331:legislation & jurisprudence / Q000639:trends; D006801:Humans; D009980:Influenza A virus / Q000235:genetics / Q000502:physiology*; D007251:Influenza, Human / Q000821:virology; D009154:Mutation; D009976:Orthomyxoviridae Infections / Q000635:transmission* / Q000821:virology; D014481:United States; D014483:United States Dept. of Health and Human Services / Q000331:legislation & jurisprudence