Speaking to The Guardian, Makoto Tsubokura, team leader at the centre, said when compared to masks, face shields are less effective in preventing the spread of droplets from an infected person’s mouth.
In a previous interview with TimesLIVE, Dr Susan Louw, a haematopathologist at SA's National Health Laboratory Service, explained: “When you’re wearing a mask you’re also protecting your fellow human beings against you sneezing and coughing and transmitting the virus to them. A face shield might still allow virus to escape and infect the person that is standing next to you.”
Speaking on the same topic, Prof Wolfgang Preiser, head of medical virology at Stellenbosch University’s department of pathology, said face shields may offer an additional degree of protection against Covid-19 as long as you wear them in conjunction with a face mask and observe the correct social distancing protocols.
Tsubokura added that individuals who have been advised not to wear masks for reasons such as underlying respiratory problems could wear face shields, provided this is done outdoors or in well-ventilated indoor settings.