105 VD Shadow on HEALTH Under war conditions, the number of cases of venereal disease in Britain has risen every year, and this increase is one of the few "black spots" on the nation's wartime health record. A very important cause of the spread of venereal diseases is ignorance. The object of these advertisements is to provide information of their prevalence; how they are contracted; and how they may be cured by early treatment. What are the Venereal Diseases? There are a number of them, but the main ones are syphilis and gonorrhœa, two very different diseases caused by different germs.