Brazil began a nationwide anti-polio campaign on September 24, targeting 14.3 million children under age 5. Booster doses are also encouraged for children and adolescents under age 15. MercoPress
Brazil began a nationwide anti-polio campaign on September 24, targeting 14.3 million children under age 5. Booster doses are also encouraged for children and adolescents under age 15. MercoPress