whole-virus vaccines prepared by merck sharp and dohme ( west point , pa. ) and merrell-national laboratories ( cincinnati , ohio ) and subunit vaccines prepared by parke , davis and company ( detroit , mich. ) and wyeth laboratories ( philadelphia , pa. ) were given intramuscularly in concentrations of 800 , 400 , or 200 chick cell-agglutinating units per dose .
C0042210
vaccines
C0887892
subunit vaccines