Where can I find a list of vaccines currently licensed for use in the U.S.?

The Food and Drug Administration (FDA) website has a list of all vaccines licensed for use in the United States at www.fda.gov/BiologicsBloodVaccines/Vaccines/ApprovedProducts/UCM093833. Note that some licensed vaccines may not currently be distributed in the United States (for example the Cervarix brand of HPV vaccine and the Zostavax brand of shingles vaccine).