Do face shields protect against coronavirus?
1/5
Not that effective
A face shield can be effective only if there is a mask underneath. There is a lot of space around the face shield for air to come in and go out.
2/5
Air droplets
Almost 100 per cent of droplets which are under five micrometres (which get released even when people talk and breathe normally) will get past the visor of a face shield.
3/5
Coughing or sneezing
In addition, 50 per cent of the larger droplets (over 50 micrometres), which get released when people cough or sneeze, will go past the visor.
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4/5
WHO advisory
The WHO has also confirmed that shields, which don’t completely cover the face, should be used in conjunction with a mask.
5/5
Back to normal
Students wearing face shields and masks attend their class as some schools were reopened after the spread of the Covid-19 coronavirus in Khokana village on the outskirts of Lalitpur district near Kathmandu.