Final Report on research and findings from a Vitamin A Supplementation (VAS) Post‐Event Coverage Survey for Mainland Tanzania that occurred in July 2010. The survey used cross‐sectional randomized cluster methodology to obtain and validate national coverage estimates for the June 2010 mass distribution round of VAS and de‐worming. The survey also characterized children missed by the VAS mass distribution round as a basis to plan better strategies to reach them in the future.