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Khaveer was 11 years old. He lived with his grandparents who both suffered from asthma and lung disease. Khaveer went to hospital several times himself, suffering from severe, life-threatening asthma attacks. His doctor referred him to a specialist and asked them to start Khaveer on a treatment called biologics, a type of medication which can help to control severe asthma.

For the first month, the doctor could see at his follow-up appointments that Khaveer was taking his medication. However, when the doctor carried out his regular check on Khaveer's FeNO level one day, he found it was 255 ppb! This is a sky-high score and helped the doctor explain to Khaveer and his family that he could die at any time if he had an asthma attack! The family understood straight away how important it is to take asthma medication regularly, as prescribed. The doctor asked Khaveer's grandmother to supervise Khaveer when he took his asthma medication and to make sure that all his prescriptions were collected on time.

With monthly checks, his respiratory team managed to reduce Khaveer's treatment. Now four years later, his FeNO level is normal, his lung function is normal and he is on minimal treatment. Testing his FeNO level was the turning point for Khaveer.

All stories are real patient stories. Names, ages and genders may have been changed to preserve anonymity.

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