Related:
When I had Covid symptoms, which included tightness in my upper chest, I also used a nebulizer - but with a product called Respiratory Relief. (can buy on Amazon)
I used one ounce, three times a day for two days. Symptom eliminated.
Covid gone with the rest of my protocol in 2.5 days.
I now have covid antibodies.
Your mileage may vary...
that is peppermint oil and some sort of silver
bttt