In an update to its Covid-19 guidance on masks, The World Health Organisation (WHO) has recommended wearing face masks when indoors with other people ‘if the ventilation has been deemed inadequate’.
“WHO advises that the general public should wear a non-medical mask in indoor or outdoor settings where physical distancing of at least one metre cannot be maintained,” the new guidance says.
“If indoors, unless ventilation has been assessed to be adequate, WHO advises that the general public should wear a non-medical mask, regardless of whether physical distancing of at least one metre can be maintained.”
As for face shields, WHO said they “provide a level of eye protection only and should not be considered as an equivalent to masks” when it came to protection against respiratory droplets.
“If face shields are to be used, ensure proper design to cover the sides of the face and below the chin,” the guidance said.