Tags | #vaccine, Brazil, china, D.C., influenza , influenza viruses, Japan, México, Mutation, Norway, norwegian institute, norwegian scientists, pandemic influenza , public health significance, Ukraine, United States, US, vaccination, virus, Washington ... Leer completo en: H1N1( Swine Flu ): Norway Virus Mutation; Seasonal Flu Vaccine Offers Moderate Protection Against H1N1. PUBLIC HEALTH SIGNIFICANCE OF VIRUS MUTATION DETECTED IN NORWAY. On November 20, the WHO briefing #17 ...