Unfortunately, it feels like if you get pneumonia once it's easier to get it again. I've never been a particularly healthy person in general, but it seems like I get pneumonia every couple of years. I've been lucky to avoid sepsis though, probably because I recognize the symptoms of pneumonia and go and get treated for it before anything else happens.
I just hope I don't ever get immune to the drugs they give you to treat the infection. I've heard that can happen.