The World Health Organization has become the center of attention in the face of the serious health situation that has been unfolding since the appearance of the covd-19 pandemic. Aware of this, this world organization has, from the very beginning, taken on the role of a centre for the dissemination of advice to the population. Therefore, they have not only been in charge of acting as a catalyst for the conduct of health professionals worldwide, but have also been concerned with publishing content aimed directly at citizens.
This example that we are dealing with today perfectly illustrates this attitude. In this case it is a booklet giving instructions on the things that YES and NO should be done when using hygiene masks. Let us make a short summary:

THINGS THAT SHOULD BE DONE TO WEAR A MASK SAFELY:
– Wash your hands before touching the mask
– Check that it is not torn or punctured
– Locate the wire piece at the top to fit the nose
– Check that the coloured part faces the front
– Place the metal piece or rigid edge over the nose
– Cover your mouth, nose and chin
– Adjust the mask to the face so that there are no openings on the sides
– Avoid touching the mask
– Remove your mask from behind your ears or head
– When taking off your mask, keep it away from you and all surfaces
– Dispose of the mask immediately after use, preferably in a closed trash can
– Wash your hands after disposing of the mask

WHICH SHOULD NOT BE DONE TO WEAR A MASK SAFELY:
– Do not use a torn or wet mask
– Do not put the mask over your nose or mouth only
– Do not wear a mask that is loose or too loose
– Do not touch the front of the mask
– Don’t take your mask off to talk to someone or do anything that requires touching the mask
– Do not leave the mask within reach of others
– Do not reuse the mask

This is the illustration:

WHO advice on the use of masks

Source: https://www.who.int/emergencies/diseases/novel-coronavirus-2019/advice-for-public/when-and-how-to-use-masks