The CDC says Public transport operators in the US should refuse to allow anyone onboard without a mask.
They "strongly recommend" all passengers and staff wear a face mask on airplanes, ships, trains, buses, subways, ride-shares, and taxis.
The new guidance is in line with existing practices around the country. Traveling on public transport increases the risk of spreading COVID-19 because people are in close contact, often for a long period of time, and may touch the same surfaces.
"Conveyance operators transporting people should refuse boarding to anyone not wearing a mask and require all people onboard, whether passengers or employees, to wear masks for the duration of travel."
The guidance comes after the World Health Organization said people "should be encouraged" to wear face masks on public transport.
"Broad and routine utilization of masks on our transportation systems will protect Americans and provide confidence that we can once again travel more safely even during this pandemic," the CDC said. "Masks are most likely to reduce the spread of COVID-19 when they are widely used by people in public settings."
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