The Thickened Light
Another story written for the SS/HG Gift Exchange. This one for the exchange of 2012.
Insofar as canon goes, wizarding medicine is implied to be superior to that used by Muggles, for all that magical medicine is focused on treating symptoms rather than curing or preventing disease.
Hermione Granger is the daughter of trained medical professionals. Neither is she unobservant. This will serve the wizarding world very well, especially when faced with a mysterious ailment with no known cause or cure. She follows the signs to a hidden chateau near Avignon, but is she prepared for what she’ll find inside?