The first diagnostic test for Zika virus infection, which can lead to birth defects if contracted during pregnancy, was approved on 23 May by the US Food and Drug Administration. The test, developed by InBios International Inc, is designed to detect antibodies to the pathogen which indicate that the body has generated an early immune response. It is meant to be used for people who show clinical signs of the disease or who have lived or travelled to Zika-infected areas. Prior to this decision, the InBios’ test and others, were authorised for emergency use only.