People pass ozone-based sanitation tunnel in Mexico City
Xinhua
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A man prepares to enter an ozone-based sanitation tunnel in the Camino Real Hotel in Mexico City, Mexico, July 2, 2020. (Str/Xinhua)

A man waits inside an ozone-based sanitation tunnel in the Camino Real Hotel in Mexico City, Mexico, July 2, 2020. (Str/Xinhua)

A man waits inside an ozone-based sanitation tunnel in the Camino Real Hotel in Mexico City, Mexico, July 2, 2020. (Str/Xinhua)

A man passes an ozone-based sanitation tunnel in the Camino Real Hotel in Mexico City, Mexico, July 2, 2020. (Str/Xinhua)

A man passes an ozone-based sanitation tunnel in the Camino Real Hotel in Mexico City, Mexico, July 2, 2020. (Str/Xinhua)