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.
LoGrippo, Gerald A. and Hayashi, Hajime
"The Hazards of Rubella Serodiagnosis from Single Serum Studies in Pregnancy,"
Henry Ford Hospital Medical Journal
: Vol. 19
Available at: https://scholarlycommons.henryford.com/hfhmedjournal/vol19/iss1/9