Why would problems with cilia cause pneumonia, ear infections and a constant runny nose?

Problems with cilia can cause pneumonia, ear infections and a constant runny nose as:

1. The mucus helps in trapping any foreign pathogens and debris.
2. The cilia helps in moving the mucus out of the sinuses and back of the nose.
3. If cilia will not function the way it should, it can lead to breathing problems and infections.
4. Therefore, diseases such as Primary Ciliary Dyskinesia affects body organs such as ears, lungs and sinuses.
5. Primary ciliary dyskinesia is a disorder characterized by chronic respiratory tract infections, abnormally positioned internal organs, and the inability to have children (infertility).