CURRENT EPIDEMIC AND MATERIAL
In a previous communication we reported a preliminary study1 conducted to ascertain the therapeutic value of pertussis antigen prepared according to the method described by Krueger2 and adapted to Haemophilus pertussis by Krueger, Nichols and Frawley.3 The preliminary work included two groups of cases, one observed in Fresno, Calif., by Dr. J. M. Frawley and the other seen in the outpatient clinic of the department of pediatrics of the University of California Medical School by one of us (M. S.). The present report details the complete study on the latter group.The epidemic which we have followed began in December 1932; it was generalized throughout the state of California and was still in progress, although comparatively few cases were developing, at the time of writing (August 1933). The incidence had been 222 reported cases per hundred thousand population. The trend had been from
STALLINGS M, NICHOLS VC. TREATMENT OF WHOOPING COUGH WITH AN ACTIVE UNDENATURED ANTIGEN. Am J Dis Child. 1934;48(6):1183–1192. doi:10.1001/archpedi.1934.01960190003001
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