Oslo Airport (OSL) Oslo Airport (OSL) One of three airports serving the Oslo region, Oslo Airport (OSL) is the second-busiest airport in Scandinavia and the 17th busiest in Europe. It serves as a hub for Air Norway, Norwegian Air Shuttle, Scandinavian Airlines and WiderÃ¸e.
Causes of Sinus Infection. Knowing the causes of sinus infection is beneficial to the patient and the layman for prevention of recurrent sinus infections! The most common cause of a sinus infection is the common cold, viral influenza and hay fever. The cold causes inflammation in the nasal passages and this inhibits the drainage of the sinuses which can cause them to become inflamed. When we have flu, our nose is filled with mucus.
Causes. Acute sinusitis can be caused by viral, bacterial, or fungal infections. Allergans and environmental irritants are other possible causes. In most cases, acute sinusitis is caused by an upper respiratory tract viral infection, such as the common cold, and usually resolves on its own.auses. Acute sinusitis can be caused by viral, bacterial, or fungal infections. Allergans and environmental irritants are other possible causes. In most cases, acute sinusitis is caused by an upper respiratory tract viral infection, such as the common cold, and usually resolves on its own.