Difficult situation I guess. Fever
with mucous in a young girl for 2 years. It will be helpful if you could put it down the CT report. Is the mucous very thick which is difficult to clear. She may have certain genetic related condition and may require genes study at a higher center institute like Aga khan etc. She need regular physiotherapy
to help clear the mucous. She may also require something called bronchoscopy
which is like endoscopy
where the doctor puts a tube with camera through nose or mouth inside the lung and wash the lung to test for unusual infections. She may need prolonged course of antibiotics through the veins. if you could communicate further with more information may be i could narrow down the possible problem.