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What is it's purpose? Does it also help to clear phlegm from the chest? I have been discharged from hospital after an exacerbation of my copd condition. I am still coughing up green phlegm although ...

Asthma and chronic obstructive pulmonary disease sufferers could be forced to fork out extra for their next inhaler with Covid-19 delaying the manufacture and shipping of a puffer used by thousands.