Pope's problems aggravated by Parkinson's

The pope’s breathing problems are not a routine complication of the flu but are worsened by his Parkinson’s disease, several doctors said.

“A normal person might get some tightness or constriction in the throat” but would not suffer spasms of the trachea, or windpipe, severe enough to necessitate hospital treatment, said Dr Jaimie Henderson, a Parkinson’s expert at Stanford University School of Medicine in the US.