Hi, Thanks for asking. Based on your query, my opinion is as follows. 1. Complete clearance of pneumonia usually takes upto 6 weeks. 2. Yes, it is normal, especially with diabetes for infection to be persistent and one lung will heal faster than another. 3. Improved diet and deep breathing exercises with spirometer will be helpful. Later, need to get vaccination with Hemophilus influenzae to avoid recurrent infection. 4. Even after going back from hospital, regular breathing exercises along with physiotherapy will be required for upto 6 months, to heal all fibrous septae. Diabetes mellitus, being under control is important as it will hasten healing. Hope it helps. Any further queries, happy to help again.