As more people get vaccinated and spring weather and sunshine beckon us outdoors, one question may be nagging at you: Do we still need to wear masks outside?
More than a year into pandemic life, many people remain confused about the risk of spending time outdoors around other people. A growing body of research shows that transmission of Covid-19 is far less likely outdoors than inside, and the risk will get even lower as more people get vaccinated and cases continue to decline. But many states have yet to lift strict outdoor mask mandates. In Massachusetts, for instance, outdoor masking is required at all times, even when nobody else is around.
Recently the online magazine Slate stirred controversy when it suggested an end to outdoor mask rules. The article won support from top public health experts and even The New England Journal of Medicine blog but prompted a fierce backlash from readers, who noted that while the risk of outdoor transmission may be low, it’s not zero.
“Shallow and selfish take,” wrote one reader on Twitter. “You have blood on your hands. You should feel ashamed,” posted another.
After a year in which many of us have learned to dutifully wear masks and look askance at anyone who does not, it’s understandable that people remain fearful when they cross paths with the unmasked. So how do you make the right decision about when to wear a mask outside?
- The Times.
Many virus and public health experts say the guidance hasn’t changed — spending time with others outside during the pandemic has always been safer than indoors. But whether a mask is needed outdoors depends on the circumstances, including local public health rules and whether you and the people you’re with are vaccinated. Brief encounters with an unmasked person passing you on the sidewalk or a hiking trail are very low risk, said Linsey Marr, a professor of civil and environmental engineering at Virginia Tech and one of the world’s leading experts on viral transmission. Viral particles quickly disperse in outdoor air, and the risk of inhaling aerosolized virus from a jogger or passers-by is negligible, she said. Even if a person coughs or sneezes outside as you walk by, the odds of you getting a large enough dose of virus to become infected remain low, she said.
