“Juliet”, a woman living in London, was diagnosed with a mysterious illness in November 2015, Ian Cropley, a consultant in infectious disease from The Royal Free London NHS Foundation Trust, was there to investigate.

In this podcast, we find out how Zika, once a little known virus causing a rash and fever, has subsequently become a global health emergency. We also discuss how the infection is linked to microcephaly, and what we still need to understand to control the disease.

All Zika virus resources from BMJ are now freely available on www.bmj.com/freezikaresources.