According to the Ambulatory Syllabus of Columbia University Medical Residency Program, the contagious nature of upper respiratory tract infections is the main reason why it is the common acute illness in the US and the world, and the reason for incurring absences from school or from work.
sinusitis
Overcoming With Allergic Rhinitis
Persons afflicted with certain hypersensitivity reaction due to changing weather, air pollution, pet’s fur and to a particular allergen are suffering from Allergic Rhinitis.