My first thought is that he probably made poor choices that led to his infections, but then I don't know that because there are lots of ways to contract either disease.
So my second, better thought is that, whatever the case, I DO feel sorry for him - since human misfortune calls forth (and SHOULD call forth) pity and mercy from the human heart.
In fact when I have seen people on their deathbeds from lung cancer, even though I knew they chose to smoke cigarettes knowing it might lead to that, I still felt sorry. When others were dying of liver failure, after living a 3-martini life, I still felt sorry. When others hearts failed, after eating like pigs despite their friends' warnings, I still felt sorry. When others died on the highway, despite being reminded hundreds of times to use their seatbelt, I still felt sorry.
That's just the way a healthy human feels.