The Mexican border city of Nogales, Sonora, has set up ‘sanitizing tunnels’ to disinfect people leaving the US through Nogales, Arizona. On the Mexican side of two major border crossings, drivers coming from Arizona must exit their vehicles and step into an inflatable tunnel that sprays them with a cleansing solution. The border city’s mayor has told Mexican news outlets that a majority of the people who have tested positive for Covid-19 in Nogales, Sonora, had recently returned from the US