From today’s Guardian
“People over 60 or with health issues should wear a medical-grade mask when they are out and cannot socially distance, according to new guidance from the World Health Organization, while all others should wear a three-layer fabric mask.
The announcement on Friday marks a significant change of stance by the WHO, which until now has been reluctant to advocate the wearing of masks by the public because of limited evidence that they offer protection.
The health body’s new guidance document says the over-60s and people with underlying health conditions should wear medical masks in “settings where physical distancing cannot be achieved” because of “increased risk of infection and/or negative outcomes”.
All others should wear a three-layer fabric mask: absorbent cotton closest to the face, followed by a polypropylene layer and then a synthetic layer that is fluid-resistant, the WHO said. It envisages that these masks can be made at home, but that small companies may begin to produce them, also providing jobs.“