Thanks for your question on Healthcare Magic.
I can understand your concern.
No need to worry for this scar lesions in lungs.
All lung infections including
tuberculosis heal after treatment.
They heal mostly by following three mechanism.
1.
Fibrosis (most common)
2. Calcification.
3. Rarely Complete resolution.
So this fibrosis look like scar lesions on chest
x ray. They are inactive, noninfectious lesions. So no treatment is required for them.
They will remain as it is through out the life.
No need to worry as they are harmless.
And these scar have no effect on his life span. Yes, he can definitely down exercise.
Hope I have solved your query. I will be happy to help you further. Wishing good health to your husband. Thanks.