Sir, My mother got infected with covid on April 16th and got admitted in COVID hospital for further treatment .After 45 days of treatment and observations she was discharged by them.Now she is at home treatment with 24hrs oxygen support and is at 2 to 3 ltr oxygen with saturation at 95 to 98. But when we remove the oxygen mask or nasal canula ,her saturation drops to 78 and below within 5 mins.Her saturation never remains at a stable value.She neither have any fever,cough or cold . Doctors told us during discharge that at home environment she will recover soon but we don't find any visual improvement. Can you please guide us what should be our next action plan? How to make her independent of oxygen support?How to improve her oxygen saturation without any external support?