Human and financial consequences of herding in oncology drug development: clinical trials of TIGIT inhibitors

Because of the high attrition rate (95%) in the development of drugs for oncology, herding amplifies the loss of human and financial resources incurred during drug development, with large number of patients enrolled in clinical trials of experimental drugs that are unlikely to receive approval for clinical use. Herding concentrates resources at the expense of investment in a broader portfolio of drug development programmes with a spread of risk against attrition.