A bit more helpful info should you find yourself developing pneumonia. This came from a Teledoc Doctor, and makes sense.
It’s very important that you stay heavily hydrated so your lung fluids (mucous, phlem) stay thin and mobile, allowing you to cough it up. Do not get dehydrated, stubborn plugs can form in your lungs air tubes leading to persistent / permanent blockages.
You should constantly drink enough water that your pee is colorless. The doc said “If there’s any yellow, drink MORE water”.
That’s what I did, worked for me.
And another perhaps helpful point;
If you suspect you are developing pneumonia ( not necessarily Covid, any flavor) it is probably a good idea to avoid cough suppressants entirely.
As painful as it can get to be, coughing is what you NEED to do to keep the fluids flowing.
One thing I noticed, the stuff I coughed up after a couple of hours of sleeping was definitely thicker than the stuff that came up during waking hours. As I pointed out upthread, the Teledoc stressed that you should stay extra hydrated so the lung stuff can be expelled and not form blockages.