This morning I was at the marketplace, after more than a week without going out. I was astonished by what I saw: almost everyone (adult, child, woman, man, young, old, buyer, seller, security guard...) had a mask. I was astonished because in social networks (Twitter, Facebook) I keep hearing about "the indiscipline of Senegalese who do not respect the barrier measures, especially the wearing of masks". I personally found it very responsible that everyone has a mask, with a few rare exceptions. Then I am aware that there are all the problems related to the quality of the mask and its use. When to use a mask? What type of mask to wear and for how long? How to put the mask on and how to take it off? etc.