@BOOK{NAP11041, author = "Institute of Medicine", title = "Review of the Centers for Disease Control and Prevention's Smallpox Vaccination Program Implementation: Letter Report #6", doi = "10.17226/11041", url = "https://nap.nationalacademies.org/catalog/11041/review-of-the-centers-for-disease-control-and-preventions-smallpox-vaccination-program-implementation", year = 2004, publisher = "The National Academies Press", address = "Washington, DC" }