Vaccination in Infancy with Oral Poliomyelitis Vaccine and Diphtheria, Tetanus, Pertussis VaccineBr Med J 1963; 1 doi: http://dx.doi.org/10.1136/bmj.1.5331.641 (Published 09 March 1963) Cite this as: Br Med J 1963;1:641
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