Face shields are becoming a popular choice for people looking for protection against Covid-19. Photo: Dickson Lee
Covid-19 research shows downsides of face shields and valve masks
- US study finds the more comfortable alternatives give less protection than cloth and surgical coverings
- Chinese doctor agrees, and describes exhalation valves as ‘selfish’ because they only protect the wearer
Topic |
Coronavirus pandemic
Face shields are becoming a popular choice for people looking for protection against Covid-19. Photo: Dickson Lee