Invisible enemies. Part 4, Will we ever learn?.

Written and presented by Dr. Norman Swan, the series ranges worldwide in order to map the history and geography of epidemics past and present, using a rich variety of visual material. Part Four: Will We Ever Learn?" The history of syphilis in Europe; relationship between syphilis and AIDS and between sexually transmitted disease and drug addiction; methods of control of drug abuse in New York and Liverpool; government attitudes to tobacco advertising; and smoking and diet-related diseases.