Narrator with the american soldier goes american medicine, backing him up, by his side, with him in his advance. In wartime and peace, the medical department carries on, fighting disease, healing and rehabilitating the sick and wounded, and constantly working to search out disease vectors to prevent, detect, and control epidemics. To pursue this mission successfully, the medical department was backed up by a farflung network of laboratories stretching from north to south, east to west. Clinical, Public Health, and Research Laboratories were required everywhere. Diseases new to the army doctor were being encountered. New diagnostic procedures, methods of treatment and control had to be developed and evaluated. Operation and combat under extreme heat and cold produced a produced problems that were a challenge to the medical department and its laboratories. Behind this vast medical Laboratory Organization which followed the armies to every distant outpost on our fighting fronts were the m