Health officials in Mexico are beginning to administer a coronavirus vaccine to people in the neighboring state of Sonora. 

Sonoran health officials said Thursday that the Johnson and Johnson vaccine was being put in the arms of folks in western Sonora cities like the border town of Sonoyta and Rocky Point. Then crews will work their way east and make it available to people in Nogales and then in cities across from Cochise County such as Agua Prieta.

The U.S.’ vaccine donation to Mexico is expected to help speed up the reopening of the U.S.-Mexico border which has been closed to nonessential travel for more than a year.