Board certified family nurse practitioner Marguerite Clohisy administers a Fluzone seasonal flu vaccination to Ann Marie Maida at a CVS pharmacy MinuteClinic in Chicago on Tuesday, Sept. 1, 2009. Drugstore operators are beginning their seasonal flu shot campaigns several weeks early this year, saying they expect greater demand for the vaccine in a year when the swine flu strain has dominated the news. (AP Photo/M. Spencer Green) ¨ ¨ Published Caption 9/9/2009: New York is requiring all health workers get immunized against seasonal and swine flu. Other states are weighing whether to follow suit. ¨ ¨ Published Caption 8/20/10: Rite Aid, Walgreen and CVS either have begun selling flu shots or will begin next week.