with my experience from watching diffrent types of symptoms in books and also on television( Tv, Medical shows, ect..) Almost, symptoms most related from our body's lack of strength and energy. My opinion about your friend's illness is she might get it because the environment around her. I know lots of people who get sore throat from the air >have to looks for any sign of cold and hot weather~~~ it may cause liked allergies , sore in throat, sneezing, ect... Doctor cant find the problem that caused it because the bad air go into the lung and also came out from the lung. If u think when u moved away it may help your gf so do it for her health/ This is just my opinion and u can believe it or not . !! i dont care but for the good for your gf' health. Then asked her, u want to stay here or u want to move away... and remember breathing in a good environtment may help her!!!