An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Markowitz LE, Dunne EF, Saraiya M, Lawson HW, Chesson H, Unger ER; Centers for Disease Control and Prevention (CDC); Advisory Committee on Immunization Practices (ACIP).Markowitz LE, et al.MMWR Recomm Rep. 2007 Mar 23;56(RR-2):1-24.MMWR Recomm Rep. 2007.PMID: 17380109Free article.
Jain N, Euler GL, Shefer A, Lu P, Yankey D, Markowitz L.Jain N, et al.Prev Med. 2009 May;48(5):426-31. doi: 10.1016/j.ypmed.2008.11.010. Epub 2008 Dec 6.Prev Med. 2009.PMID: 19100762