Why a US-funded infant vaccine trial in Guinea-Bissau was called off

A US-funded vaccine trial involving babies in Guinea-Bissau was cancelled after it drew sharp criticism. Critics condemned the study as unethical and neocolonial because half of the infants enrolled would not receive the vaccine being tested. The controversy centred on the design of the trial, which used a control group that went without the vaccine. The article examines the reasons behind the decision to halt the study.