Transmission of Hemagglutinin D222G Mutant Strain of Pandemic (H1N1) 2009 Virus

Abstract

A pandemic (H1N1) 2009 virus strain carrying the D222G mutation was identifi ed 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.