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.
Wright PF, Bhargava M, Johnson PR, Thompson J, Karzon DT.Wright PF, et al. Among authors: johnson pr.Vaccine. 1985 Sep;3(3):305-8. doi: 10.1016/s0264-410x(85)90140-9.Vaccine. 1985.PMID: 3904259Clinical Trial.
Edwards KM, Snyder P, Thompson JM, Johnson PR, Wright PF.Edwards KM, et al. Among authors: johnson pr.Vaccine. 1986 Mar;4(1):50-4. doi: 10.1016/0264-410x(86)90097-6.Vaccine. 1986.PMID: 3962451Clinical Trial.