Henry Ford Hospital Medical Journal


Hemagglutination-inhibition (HA-I) titres for rubella were studied in 200 nurses, 87 pregnant women, in plasma and serum pools, and in laboratory personnel. The percentage of individuals susceptible to rubella in the child-bearing ages was 11.5%> among the non-pregnant nurses and 23% among the pregnant women assayed at their first prenatal visit. Serodiagnosis of active rubella necessitates two or more serial serum studies during the first trimester of pregnancy.