Optimal ages for vaccination against measles in the state of Sao Paulo, Brazil, taking into account the mother`s serostatus - Zanetta, Regina Aparecida Chiarini; Amaku, Marcos; Zanetta, Dirce Maria Trevisan; Burattini, Marcelo Nascimento; Massad, Eduardo; Azevedo Neto, Raymundo Soares de (International Congress on Infectious Diseases, 2000)