SUBJECT: H1N1 FLU VIRUS (HUMAN SWINE INFLUENZA)/SEVERE RESPIRATORY INFECTION This guidance document is being provided by Health ... outbreak of H1N1 Flu Virus (Human Swine Influenza) in North America. This guidance has been developed to assist federal ... developing H1N1 Flu Virus (Human Swine Influenza). This guidance is based on current available scientific evidence about this ... Human-to-human transmission of H1N1 Flu Virus (Human Swine Influenza) is occurring. • Human-to-human transmission of H1N1 Flu ...