[livius drusus]

Okay, I think this is probably a really stupid question and just an issue of phrasing, but when they were covering SAARS last night, the Vietnamese nurse mentioned how agonizingly painful it was (like a wild animal devouring your lungs piece by piece) and Brad Pitt said that new diseases are often more painful and more deadly because we have no immunity at all to them. I get the more deadly, but I was surprised to hear that these diseases would also be more painful. Is that true, or am I misinterpreting Brad?