In 1941, at Christmastime more than 600 German soldiers visited Paris and were infected with the bacillus of Eberth, the agent of typhoid fever. All of the infections occurred at the Brasserie La Brune situated in the center of Paris. It was, in fact, an act of Resistance. The proof of the infection was rapidly given by Lucien Brumpt using a home-made hemodiagnostic method. This quick hemodiagnostic technique is easy to perform, inexpensive and still could be used.