A 22 yo man comes to GP with 3 week history of sneezing, rhinorrhea and coughing. He takes no meds and denies pharyngitis or epistaxis. Temp is 99 resp is 20 bp is 112/73. Physical exam shows clear, bilateral rhinorrhea, pale blue nasal mucosa and cobblestoning of posterior pharynx. 1. What is likely diagnosis? 2. What key immune cell is implicated in immune response in this condition? What do they do? 3. What are the key cytokines associated with their response?

The main function of the respiratory system is gas exchange (O2 and CO2). Ventilation is the movement of air through the respiratory tract into (inspiration) and out of (expiration) the respiratory zone (lungs).