Abstract:tory epithelium. In most cases, viral infection is limited to the upper airways; however, infections of the lower airway regions occur in a significant number of infected individuals. Worldwide, approximately 90% of the cases of the "common cold" are caused by viruses and most are seen in the winter months. These viruses are spread from person to person and commonly during hand-to-hand contact. This chapter focuses on the common viral causes of respiratory tract infections: adenovirus, coronavirus including se… Show more
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