Rubella susceptibility and continuing risk of infection in pregnancy.

Sera of 2000 pregnant women attending the antenatal clinic of the Aga Khan University Hospital were tested for rubella antibodies. Of these 1684 (84.2%) were immune and 316 (15.8%) were susceptible to rubella. Majority (99.8%) of the women were Asian in origin. Susceptibility decreased with increasing age and parity. We conclude that apart from vaccination of all young children greater attention should be paid to immunization of women of child-bearing age.