PT - JOURNAL ARTICLE AU - Jin, Xian Wen AU - Mossad, Sherif Beniameen TI - 2012-2013 Influenza update: Hitting a rapidly moving target AID - 10.3949/ccjm.79a.12151 DP - 2012 Nov 01 TA - Cleveland Clinic Journal of Medicine PG - 777--784 VI - 79 IP - 11 4099 - http://www.ccjm.org/content/79/11/777.short 4100 - http://www.ccjm.org/content/79/11/777.full SO - Cleve Clin J Med2012 Nov 01; 79 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.