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.
Jansen AG, Rodenburg GD, de Greeff SC, Hak E, Veenhoven RH, Spanjaard L, Schouls LM, Sanders EA, van der Ende A.Jansen AG, et al.Vaccine. 2009 Apr 14;27(17):2394-401. doi: 10.1016/j.vaccine.2009.01.127. Epub 2009 Feb 6.Vaccine. 2009.PMID: 19428856
Jansen AG, Rodenburg GD, van der Ende A, van Alphen L, Veenhoven RH, Spanjaard L, Sanders EA, Hak E.Jansen AG, et al.Clin Infect Dis. 2009 Jul 15;49(2):e23-9. doi: 10.1086/600045.Clin Infect Dis. 2009.PMID: 19522653