The introduction of jet injection mass vaccination into the national smallpox eradication program of Brazil.
D001938:Brazil; D003365:Costs and Cost Analysis; D006280:Health Workforce; D006801:Humans; D007267:Injections / Q000295:instrumentation*; D007271:Injections, Intradermal; D012424:Rural Population; D012899:Smallpox / Q000517:prevention & control*; D012900:Smallpox Vaccine; D014505:Urban Population; D014611:Vaccination / Q000295:instrumentation*
D012900:Smallpox Vaccine