1. Patients age more than 18 years who have been discharged after being admitted for the treatment of COVID 19. <br/ >2. Patients required assisted respiratory therapy (O2 therapy, BiPaP ventilation or Mechanical ventilation) during Hospital stay. <br/ >3. Willing to participate and give consent <br/ >

1. Patients age more than 18 years who have been discharged after being admitted for the treatment of COVID 19. <br/ >2. Patients required assisted respiratory therapy (O2 therapy, BiPaP ventilation or Mechanical ventilation) during Hospital stay. <br/ >3. Willing to participate and give consent <br/ >

1. Patients age more than 18 years who have been discharged after being admitted for the treatment of COVID 19. <br/ >2. Patients required assisted respiratory therapy (O2 therapy, BiPaP ventilation or Mechanical ventilation) during Hospital stay. <br/ >3. Willing to participate and give consent <br/ >

1. Patients age more than 18 years who have been discharged after being admitted for the treatment of COVID 19. <br/ >2. Patients required assisted respiratory therapy (O2 therapy, BiPaP ventilation or Mechanical ventilation) during Hospital stay. <br/ >3. Willing to participate and give consent <br/ >