A Comparison of the Responses of 100 Infants to Primary Poliomyelitis Immunization with Two and with Three Doses of VaccineBr Med J 1959; 1 doi: http://dx.doi.org/10.1136/bmj.1.5129.1083 (Published 25 April 1959) Cite this as: Br Med J 1959;1:1083
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