Cape Verde has become the first sub-Saharan nation to be declared malaria-free in fifty years. But mosquitoes, the insects that spread the deadly disease, have started to fight back. One type of the insect has adapted to break all the rules and dodge all the measures we’ve brought in to beat them. Unlike most mosquitoes, Anopheles Stephensi, can live in urban environments potentially putting people in cities in Nigeria, Sierra Leone, Kenya, Djibouti, Ghana and more at risk.

The BBC’s Tulip Mazumdar explains the symptoms and effects of malaria. And Dorcas Wangira, our Africa Health correspondent in Kenya, talks to us about this adapted mosquito and the challenges it poses.

Email: whatintheworld@bbc.co.uk WhatsApp: +44 0330 12 33 22 6 Presenter: Hannah Gelbart Producers: Alex Rhodes and Maria Clara Montoya Editors: Emily Horler and Simon Peeks