Drupal-Bibcite0<style face="normal" font="default" size="100%">De la Macorra F and Corozza FA (1966) Study of induced typhoid fever in man. I. Evaluation of vaccine effectiveness</style><style face="normal" font="default" size="100%">De la Macorra F and Corozza FA (1966) Study of induced typhoid fever in man. I. Evaluation of vaccine effectiveness</style>