RT Journal Article SR Electronic T1 Update on 2009 pandemic influenza A (H1N1) virus JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 577 OP 582 DO 10.3949/ccjm.76a.05009 VO 76 IS 10 A1 Steven M. Gordon YR 2009 UL http://www.ccjm.org/content/76/10/577.abstract AB The pandemic of a novel strain of swine-origin influenza A (H1N1) is expected to make this a difficult flu season. Fortunately, this strain is relatively mild, and the principles of prevention, diagnosis, and treatment remain the same. Physicians will have a number of complex decisions to make about when to test, when to treat, and when to simply reassure.