A pandemic (H1N1) 2009 virus strain carrying the D222G mutation was identified in a severely ill man and was transmitted to a household contact. Only mild illness developed in the contact, despite his obesity and diabetes. The isolated virus reacted fully with an antiserum against the pandemic vaccine strain.
Transmission of Hemagglutinin D222G Mutant Strain of Pandemic (H1N1) 2009 Virus / S.Puzelli; M.Facchini; D.Spagnolo; M.A.De Marco; L.Calzoletti; A. Zanetti; R. Fumagalli; M. L. Tanzi; A.Cassone; G.Rezza; I.Donatelli; and the Surveillance Group for Pandemic A (H1N1) 2009 Influenza Virus in Italy. - In: EMERGING INFECTIOUS DISEASES. - ISSN 1080-6059. - 16(2010), pp. 863-865. [10.3201/eid1605.091858]