Drone of San Francisco park with 6 foot circles painted for social distancing with zoom to skyline

circle social social distance covid19 people shelter in place social distancing public covid 2 meters safety distance stop coronavirus pandemic san francisco coronavirus distance quarantine new normal epidemic keep your distance flatten the curve isolation round distancing foot corona virus thank you for social distancing 2 m contagious personal space health corona six vector measure prevention please keep distance avoid feet protection virus instruction safety 6 feet warning 6 ft 6ft caution