Includes frontispiece: Influenza immunization. : The Public Health Service evaluates vaccines for safety, purity, and potency against influenza. The student inoculated here is participating in a potency study. (See page 861.)

The accompanying summary covers some of the principal findings presented in Public Health Monograph No. 47, published con- currently with this issue of Public Health Reports. The authors are with the department of public health, School of Veterincry ...