a serological survey of measles vaccine in a rural region of eski┼čehir in turkey.we designed this longitudinal study as a response to measles outbreaks which occur occasionally in eski┼čehir in turkey to investigate the incidence of primary and secondary vaccine failure. the investigation was conducted over two periods (december 1993 to october 1994 and april 1995 to october 1995). two study groups were involved, infants aged 9-11 months and children aged 18 months to 9 y. during december 1993 to october 1994 prevaccination sera was collected from 35 infants aged 9-11 months ...19979392967
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