Made available in DSpace on 2022-04-29T08:45:20Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-01-25; American Laryngological Association; GlaxoSmithKline; Pfizer; Background: Varicella vaccine was introduced into the Brazilian Immunization Program in October 2013, as a single-dose schedule administered at 15 months of age. Its effectiveness had not yet been assessed in the country. Methods: A matched c...