SAS requires that all passengers from the age of six must wear a face mask that covers both the nose and mouth. Therefore, all passengers who are to fly from Sundsvall-Timrå must either bring their own mouthguard, or buy one on the spot.

If you do not have a mouth guard when you board the gate, you are not allowed to board the plane.

Filter purifies the air

The aircraft also have HEPA filters that purify the air. According to SAS's website, the filters capture up to 99.97 percent of all microfibers, such as viruses and bacteria, to ensure high air quality.

- We get more and more information about how this is contagious and when we will now also work with the protections that you can have, we believe that travel will start to start, says Frank Olofsson, airport manager at Sundsvall-Timrå Airport.

Watch the clip and hear the airport manager tell you how to do it.