RT Journal Article SR Electronic T1 Investigation of the first cases of human-to-human infection with the new swine-origin influenza A (H1N1) virus in Canada JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 159 OP 163 DO 10.1503/cmaj.090859 VO 181 IS 3-4 A1 Jennifer Cutler A1 Emily Schleihauf A1 Todd F. Hatchette A1 Bev Billard A1 Gaynor Watson-Creed A1 Ross Davidson A1 Yan Li A1 Nathalie Bastien A1 Shelly Sarwal A1 the Nova Scotia Human Swine Influenza Investigation Team YR 2009 UL http://www.cmaj.ca/content/181/3-4/159.abstract AB The outbreak of human infection due to the novel swine-origin influenza A (H1N1) virus began in Mexico in March 2009. As of July 6, 2009, more than 94 000 laboratory-confirmed cases were reported in over 100 countries, including 7983 cases in Canada. In this report, we describe the epidemiologic and clinical characteristics of the first cluster of reported cases of human-to-human transmission of the new influenza virus in Canada.