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.
Sinus infection (sinusitis) is caused by allergies, infection, and chemicals or other irritants of sinuses. Signs and symptoms are headache, fever, and facial tenderness, pressure, or pain. Treatments of sinus infections are generally with antibiotics and at times, home remedies.
Most often, acute sinusitis is caused by a virus (known as acute viral sinusitis) or bacteria (acute bacterial sinusitis). This is why the terms sinusitis and  sinus infection  are used interchangeably. About 98 percent of acute sinusitis cases are caused by a virus. When viruses enter the sinuses, they can: