RT Journal Article SR Electronic T1 2012-2013 Influenza update: Hitting a rapidly moving target JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 777 OP 784 DO 10.3949/ccjm.79a.12151 VO 79 IS 11 A1 Xian Wen Jin A1 Sherif Beniameen Mossad YR 2012 UL http://www.ccjm.org/content/79/11/777.abstract AB From the deadly 2009 influenza A H1N1 pandemic to the looming threat of bird flu H5N1, the recent outbreak of swine flu H3N2v at agriculture fairs, and the emergence of drug-resistant H1N1, we are constantly challenged by influenza viruses. Vaccination remains the main strategy for prevention. With the knowledge gained from past pandemics, an adequate vaccine supply, and an updated preventive strategy, we are in a better position to face the challenge.