[Immunity status of 2 Chilean female populations against rubella].

A total of 1248 females were studied to determine immunity against rubella. A higher socio-economic subgroup (n = 789) and a lower one (459) were defined. Inhibition of hemagglutination was used to detect immunity. Positive results were obtained in 95% of females and no differences were detected for both groups. 78% of positive titers fell in the dilution range 1:20 to 1:80.