National Institute of Allergy and Infectious Diseases (U.S.)2007-03-272007-03-272003-07National Institute of Allergy and Infectious Diseases (U.S.) (2003). Understanding vaccines: what they are, how they work. Retrieved November 20, 2006, from National Institute of Allergy and Infectious Diseases web site: http://www.niaid.nih.gov/Publications/vaccine/pdf/undvacc.pdfhttps://hdl.handle.net/1805/74955 pages.Background information on vaccines and vaccination. Includes an extensive glossary.1441241 bytesapplication/pdfen-USvaccinesvaccinationimmunizationinfectious diseasesmicrobesvirusesVaccines.Vaccination.Immunization.Understanding vaccines: what they are, how they workBookVaccination. 9.5.1.