Schizophrenia was the first thing I thought of after reading that Mr. Poppo had been a good student and seemed to have everything going for him. Doesn't schizophrenia usually strike in early adulthood?
Also, JMO, but I think not only Mr. Poppo's environment worked against him in surviving an infection, but his age and health also. The woman that was attacked by the chimp was either in her thirties or forties and appeared to be in good health.
My hope is that either Mr. Poppo will survive this, get a face transplant, a place to live and someone who can watch over him to make sure he takes his meds and live out the rest of his life as he most likely deserved, safe and cared for.
I hate to say this, but my other wish for him is that IF he will never get a face transplant, never get the opportunity to live a "normal" life (whatever that is), that he will pass peacefully.
ETA: Sonya610, my apologies. I see where you already mentioned about Mr. Poppo's health working against his survival.