No, face shields are not a replacement for a face mask.
Face shields may be used when masks are not an option:
- When communicating using lip-reading, when visual facial cues are essential, or when people may be unable to wear a mask due to a medical condition, a face shield may be an alternative to no mask.
- Some face shields may provide better protection than others. When needed, use face shields that wrap around your face and extend below the chin as well as hooded face shields.
- Non-medical clear masks that cover the nose and mouth are another option when visual communication is necessary. These options have not been widely assessed for their effectiveness.
Source: http://www.bccdc.ca/health-info/diseases-conditions/covid-19/prevention-risks/masks
Source: https://www.canada.ca/en/public-health/services/diseases/2019-novel-coronavirus-infection/prevention-risks/about-non-medical-masks-face-coverings.html#a8
More information:
- Selecting and using face shields in non-health care settings (WorkSafeBC resource)