The obligations of organisations associated with policy formation and implementation of international mass public health programmes are explored. Lines of responsibility are considered to become unclear because of the large number of agencies associated with such programmes. A separation of the relevant obligations among the bodies responsible for the formulation and those responsible for the implementation of the policies is suggested. The continuing oral polio vaccine campaign against poliomyelitis in India is used to illustrate the general argument. Although the aim (...) of the programme is legitimate and laudable, unnecessary harm is currently being caused to some children as a result of elements of the policy and this should be rectified immediately. Such mass programmes should take care to ensure that people are not unnecessarily sacrificed in the drive to attain the desirable ends of the policy. (shrink)