South China Morning PostCovid-19 research shows downsides of face shields and valve masksSep 3, 2020bookmark_bordersharemore_vert
The New York TimesFace Shields and Valved Masks Offer More Comfort but Less Protection (Published 2020)Sep 2, 2020Tara Parker-PopeBy Tara Parker-Popebookmark_bordersharemore_vert
EurekAlertFace shields, masks with valves ineffective against COVID-19 spreadSep 1, 2020bookmark_bordersharemore_vert
Livescience.comVisualization shows face shields may not protect against COVID-19 spreadSep 1, 2020Rachael RettnerBy Rachael Rettnerbookmark_bordersharemore_vert
Phys.orgFace shields, masks with valves ineffective against COVID-19 spread: studySep 1, 2020bookmark_bordersharemore_vert