The World Health Organisation has said new research indicates that a face mask to be used to curb spreading COVID-19 must be made of 3 layers of different fabrics, The Herald reports.
This was revealed by WHO Director-General Dr Tedros Adhanom Ghebreyesus who said WHO has published new COVID-19 guidelines:
I wish to be very clear that the guidance we are publishing today is an update of what we have been saying for months: that masks should only ever be used as part of a comprehensive strategy in the fight against COVID.
Masks on their own will not protect you from COVID-19,Based on this new research, WHO advises that fabric masks should consist of at least three layers of different material. Details of which materials we recommend for each layer are in the guidelines.
According to the publication WHO recommended that a cloth mask must have:
- An inner layer being an absorbent material like cotton
- A middle layer of non-woven materials such as polypropylene (for the filter)
- An outer layer, which is a non- absorbent material such as a polyester or a polyester blend
The guidelines also emphasised that tightly woven fabrics might cause breathing difficulties.
More: The Herald