Masks Remain Extremely Effective Indoors, But Are They Necessary Outside?
Unless people are packed together, "there really just is not much spread happening outdoors," Dr. Ashish Jha of Brown University's School of Public Health says.
Scientists and public health experts agree that masks are effective at lowering the spread of the coronavirus indoors, where the vast majority of transmission is likely to occur.
But what about outside?
About two dozen states have statewide mask mandates that generally require people to wear masks outside when they're not able to stay at least 6 feet apart. Many cities have their own rules.
