My husband has had a persistent cough for 3 years now, it is getting worse, he now feels fluey a lot of the time and has a sore throat and his body is aching from all the coughing. He can t sleep as he is constantly coughing. They have found some scarring on the lungs and he is waiting for a camera down his throat. He has had endless courses of antibiotics, inhalers, steroids,nothing at all eases it. They have advised it is not lung cancer. He is at the end of his tether. We have tried air purifiers. He has had blood tests and allergy tests and everything is clear.