How do we get the oxygen therapy? What exactly is it? The article doesn't mention these details. Article is mostly fillers with no substance.
Doctors are reluctant to administer oxygen therapy due to insurance rules and regulations. For this reason, some people have purchased their own equipment such as hyperbaric chambers and self-administer oxygen. Michael Jackson was said to have had one in his mansion, and that he regularly slept in it.
While hyperbaric chambers are available for purchase, the cheaper plastic ones that are usually sold for home use may not safe as they can explode.
People with serious burns, headaches, pneumonia, infections, or sepsis may be treated successfully in hyperbaric chambers.
My doctor treated me using one of these cheap plastic hyperbaric chambers for serious headaches, but I only went to one session because the oxygen in that tank really stunk due to plasticides.