welcome to HealthcareMagic
Diabetes is a degenerative and can damage vital organs like kidney and even nerves;blood vessels.Chronic renal failure
if it has come after diabetes then it may be due to Diabetic Nephropathy
a degenerative condition due to diabetes.If your father has Pneumonia
then he requires immediate treatment with succeptible antibiotic so that he recovers soon.Please consult his treating physician and get him admitted to hospital for IV antibiotic
treatment of Pneumonia.Take him to a Physician.
Best wishes for speedy recovery.