Javno.com (2009-11-20) ↑ https://news.yahoo.com/s/afp/20091120/hl_afp/healthfluwhomutation_20091120183022. Retrieved November 22, 2009. Missing or empty |title= (help) ↑ H1N1 mutation found in some flu fatalities - Health - Cold and flu - Swine flu - msnbc.com.