In Reply.—I agree with Preblud and his colleagues that the most effective way of evaluating the immune status of the girls who seem to be seronegative is by revaccination and subsequent serological retest. This should not be too difficult in practice. I regret that1 I did not refer to the valuable studies of Weibel et al2 and others3 on the persistence of antibody after vaccination. These are distinctly encouraging, but nevertheless, in my opinion, long-term surveillance along the lines carried out by Krugman4 in respect of measles vaccine is necessary to determine the duration of immunity after early childhood immunization with rubella vaccines.
DUDGEON JA. Rubella Vaccination-Reply. Am J Dis Child. 1979;133(11):1203. doi:10.1001/archpedi.1979.02130110110028
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