'My baby died of whooping cough after doctors sent him home three times': Mother's devastation at death of baby boy Cavani-Cruz born a healthy 6lb 13oz on Feb 4 at King's College Hospital Mother Semray Mentes forced to bring him back nine days later The boy was suffering from vomiting and had a running nose and cough Semray says she was treated like a 'silly 18-year-old' by medics A month later the boy Cavani-Cruz died in hospital after his fourth visit A post-mortem concluded he had whooping cough which led to organ failure