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.
Dalton L, Spencer J, Dunn M, Albert E, Walker J, Farrell G.Dalton L, et al.Collegian. 2003 Jan;10(1):17-21. doi: 10.1016/s1322-7696(08)60615-0.Collegian. 2003.PMID: 15481505
Maj M, Fake GM, Walker JH, Saltzman R, Howard JA.Maj M, et al. Among authors: walker jh.Vaccines (Basel). 2021 Nov 30;9(12):1416. doi: 10.3390/vaccines9121416.Vaccines (Basel). 2021.PMID: 34960163Free PMC article.
Duncan NA, Loughlin NJD, Walker JH, Hocking EP, Whitney BS.Duncan NA, et al. Among authors: walker jh.Proc Natl Acad Sci U S A. 2021 Oct 5;118(40):e2022206118. doi: 10.1073/pnas.2022206118. Epub 2021 Jun 7.Proc Natl Acad Sci U S A. 2021.PMID: 34580203Free PMC article.