1. Protection against influenza after annually repeated vaccination: a meta-analysis of serologic and field studies;Beyer;Arch Intern Med,1999
2. An outbreak of influenza A in a nursing home, 1982;Budnick;NY State J Med,1984
3. Centers for Disease Control and Prevention. Experiences with obtaining influenza vaccination among persons in priority groups during a vaccine shortage—United states, October–November, 2004. MMWR 2004;53:1153-5.
4. Centers for Disease Control and Prevention. Estimated influenza vaccine coverage among adults and children—United States, September 1, 2004–January 31, 2005. MMWR 2005a;54:304-7.
5. Centers for Disease Control and Prevention. Influenza vaccine prebooking and distribution strategies for the 2005-06 influenza season. MMWR 2005b;54:307-8.