Patients in post #COVID19 recovery might need #OxygenTherapy at home. Dr. Bornali Dutta (Director, Pulmonary Medicine, Respiratory and Sleep Medicine, Medanta Gurugram) explains how to take oxygen therapy and use an oxygen concentrator at home if you have been advised by the doctor.
my opinion:
I know many of us would not have go to a hospital if we had access to oxygen at home.
Here is a link to a company that sells oxygen contrators at prices cheaper than Amazon:
https://oxygensolve.com/