![Still Confused About Masks? Here's the Science Behind How Face Masks Prevent Coronavirus | UC San Francisco Still Confused About Masks? Here's the Science Behind How Face Masks Prevent Coronavirus | UC San Francisco](https://www.ucsf.edu/sites/default/files/styles/half__image/public/2020-06/Woman-mask-grocery-store.jpg)
Still Confused About Masks? Here's the Science Behind How Face Masks Prevent Coronavirus | UC San Francisco
![In April, Half of the Public Had Worn a Face Mask in the Past Month. Now, That Number Is 95% - Morning Consult In April, Half of the Public Had Worn a Face Mask in the Past Month. Now, That Number Is 95% - Morning Consult](https://assets.morningconsult.com/wp-uploads/2020/07/30115657/GettyImages-1214307609-scaled.jpg)
In April, Half of the Public Had Worn a Face Mask in the Past Month. Now, That Number Is 95% - Morning Consult
![Requirement for Face Masks on Public Transportation Conveyances and at Transportation Hubs | Quarantine | CDC Requirement for Face Masks on Public Transportation Conveyances and at Transportation Hubs | Quarantine | CDC](https://www.cdc.gov/quarantine/images/mask-up-w-photos-letter.jpg?_=96485)
Requirement for Face Masks on Public Transportation Conveyances and at Transportation Hubs | Quarantine | CDC
![Before 2020, they had never worn masks. Now, they plan to wear them long into the future. | Wisconsin Public Radio Before 2020, they had never worn masks. Now, they plan to wear them long into the future. | Wisconsin Public Radio](https://www.wpr.org/sites/default/files/styles/resp_orig_custom_user_wide_1x/public/220312_steeno01_0.jpg?itok=GnQMLS7l)
Before 2020, they had never worn masks. Now, they plan to wear them long into the future. | Wisconsin Public Radio
![Requirement for Face Masks on Public Transportation Conveyances and at Transportation Hubs | Quarantine | CDC Requirement for Face Masks on Public Transportation Conveyances and at Transportation Hubs | Quarantine | CDC](https://www.cdc.gov/quarantine/images/mask-up-no-photos-light.jpg?_=96553)