![Person-using-bubble-PEP-device-bottle-blowing-to-remove-excess-mucus-and-phlegm](https://videocdn.cdnpk.net/videos/2d5cbf33-0496-452d-834a-2b41e2a2ab0f/horizontal/thumbnails/small.jpg)
Person using bubble PEP device bottle blowing to remove excess mucus and phlegm
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