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.
Shanson DC.Shanson DC.Trans R Soc Trop Med Hyg. 1990;84 Suppl 1:14-6. doi: 10.1016/0035-9203(90)90449-o.Trans R Soc Trop Med Hyg. 1990.PMID: 2201108Review.
Hickey MM, Shanson DC.Hickey MM, et al. Among authors: shanson dc.J Infect. 1993 Nov;27(3):243-50. doi: 10.1016/0163-4453(93)91981-t.J Infect. 1993.PMID: 8308315