In an 81 year male in poor health with pneumonia and a collasped what is the chance of survival?

Pneumonia is a common
infection. While the mortality from this disease has declined due to
improvements in modern medicine, it remains the #1 infectious cause of death.
Unfortunately, old age and pre-existing health problems increase the risk of
death due to pneumonia. Several predictive formulas based on real-world data
have been created evaluate the disease severity. However, these formulas only
provide rough estimates of the chance of survival.
Rest, take your antibiotics until they're all gone, drink alot of fluids and get
alot of sleep. You don't say what's collapsed. Is it a lung? Do whatever the dr.
says and don't try to do anything that might hinder your recovery.
hopefully a lot still :]