If, using an electron microscope, the cilia show an abnormal structure then PCD is the diagnosis. Pneumonia can be fought with antibiotics. This is also an area where physiotherapy may do very well. Ear inflammations are relieved by placing small tubes in the tympanum. This causes an increase in airway diameter and will open airways that might be narrow or closed.
Exercise can also strengthen the chest wall and respiratory muscles.
This all can help you to get rid of the mucus. Activities such as singing, playing a wind instrument all naturally encourage deep breathing. Yes, at several places genetic research is taking place.