VD 307 Venereal Diseases "—a great evil and a grave menace" —THE ARCHBISHOP OF CANTERBURY Venereal diseases have increased by seventy per cent. since the war and are still increasing. They bring tragedy into the home, endanger the public health, damage the nation's war effort, and menace the future of the race. What are the Venereal Diseases ? The two principal venereal diseases are Syphilis and Gonorrhœa. They are different diseases caused by quite different germs. Syphilis is the more dangerous of the two.