We remain learning about how COVID affects the lungs. It will take months for the lungs to recover after COVID. A number of people acquire lasting respiratory troubles once they possess the infection. You will have noticed oxygen concentrators for sale on line without a prescription. At this time, the https://allhealthmarket.com/product/medical-supplies/portable-oxygen-concentrator-generator/oxygen-concentrator-machine-camping-use-oxygenator-driving-oxygen-bar-with-24-hours-battery-lasting-oxygen/