People with asthma prescribed the wrong kind of inhaler were behind a lot of preventable deaths, a leading health charity told Good Morning Britain.
Asthma UK's Kay Boycott said some sufferers were under-prescribed inhalers designed to prevent an attack, while too many reliever inhalers were given to patients.
"What we'll say is with an asthma attack, you'll need to start hours, days, weeks before, so if you have got hay fever, start taking your preventer before the hay fever season starts to prevent them."
More top news
Some 66 people have been killed after the plane they were travelling on crashed in southern Iran.
The letter calls for an end to harassment, abuse, and impunity in a world "ripe for change".
Police say that anyone who sees Whitehouse should not approach him, but instead call them on 999 and quote incident 23 of 18 February.