“…The method fails as a practical proposition, however, in the matter of cost. If 1,000 treatments have to be given to prevent ten attacks of gonorrhoea it is scarcely economical (Willcox, 1953); but the scheme merits some consideration in certain circumstances when infection rates in troops or in particular ports are exceptionally high, as a temporary measure while other means are being used to control the focus of infection. Apart from such circumstances, the uncertainty of the prevention of syphilis does not encourage the use of oral penicillin as a good prophylactic method.…”