The US Centers for Disease Control and Prevention (CDC) said on Thursday it will no longer require travelers to wear masks in outdoor transit hubs and in outdoor spaces on ferries, buses, and trolleys, due to the lower risk of coronavirus transmission outdoors.

The change is the first in the CDC's transit mask policy announced in January and came after a lengthy review by the White House Office of Management and Budget's regulatory arm.

The CDC said it made the change "because...