https://api.elsevier.com/content/article/pii/S0042682212003200doi:10.1016/j.virol.2012.06.0181-s2.0-S004268221200320010.1016/j.virol.2012.06.018S0042-6822(12)00320-0Both influenza hemagglutinin and polymerase acidic genes are important for delayed pandemic 2009 H1N1 virus clearance in the ferret model VirologyJournal004268222012-10-2525 October 20121trueFulltrueElsevierBrandedhttp://www.elsevier.com/open-access/userlicense/1.0/