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.
Van Rompay KK, Abel K, Earl P, Kozlowski PA, Easlick J, Moore J, Buonocore-Buzzelli L, Schmidt KA, Wilson RL, Simon I, Moss B, Rose N, Rose J, Marthas ML.Van Rompay KK, et al. Among authors: marthas ml.Vaccine. 2010 Feb 10;28(6):1481-92. doi: 10.1016/j.vaccine.2009.11.061. Epub 2009 Dec 6.Vaccine. 2010.PMID: 19995539Free PMC article.