RVS is a common infection infants. For an infant ,any infection is dangerous, because they have not established mature immune system. Ventilator is very helpful for pneumonia. I am not sure about the prognosis of this, and the doctor might also not sure about this, the Rehabilitation may take a very long time, but baby's condition may deteriorate very soon. Be paitien, if you have any quesstion, consult with your doctor.