More than a million people around the world have been harmed by medical devices they assumed were safe. We hear from one woman whose life has been devastated by what she thought was a routine procedure. Science correspondent Hannah Devlin lifts the lid on the implant industry. Plus, Bryan Mealer on walking with the migrant caravan trying to reach the US

The extent of the widespread suffering caused by faulty medical implants has been laid bare in an investigation. The Guardian’s science correspondent Hannah Devlin was one of more than 250 journalists around the world working together to reveal the pain caused to tens of thousands of people fitted with contraceptive devices, medical mesh implants, pacemakers and other items.

We hear from Laura, a mother of five, who says that after receiving a contraceptive implant she had to use a wheelchair, with a devastating impact on her family life.

Plus: the Guardian’s Bryan Mealer on his experience following the migrant caravan trying to reach the US.