Is Respiratory Rehabilitation Advisable For Shortness Of Breath In A Pneumonia, Bronchitis And Flu Patient?

My mom had pneumonia, bronchitis, the flu and a fungal infection in her lungs. when I brought her to a local hospital she was intubated and had to be ambulance two hours away to a hospital that had a bed for patients on a ventilator. she was on a ventilator for three days and they discovered the fungal infection at the hospital. she was there for a total of 15 days. when I brought her home she was given a home health physical therapist, Home Health occupational therapist, home health nurse to help me take care of her she is still having quite an issue with breathing she can do only so much and gets out of breath, does anyone have any ideals or respiratory Rehabilitation or any help they can offer so that my mom can breathe easier to be able to walk and do what she did prior to this illness thank you so very much.