Typhoid fever of recent years in our army has been conspicuous by its rarity. It is our purpose here, however, to show that while rare it cannot be considered as nonexistent; that in cases of continued fever it is still to be suspected, and, even more important, that the protection of prophylactic inoculations, great as has been their service, cannot be taken as absolute to such an extent that sanitary precautions can be neglected.
Vaccination against typhoid fever is now practiced as a routine in all modern armies. At the Fifteenth International Congress in 1912, Russell1 summarized the statistics up to that time with reference to the use of typhoid vaccine in our army and the armies of Europe. During the same meetings Nichols2 described some of the methods of producing typhoid vaccine, giving in detail practically the same method as is now used in producing all typhoid