Happily, except for playgrounds, outdoor public spaces are still open where I live.
The outdoors and sunshine are such strong factors in fighting viral infections that a 2009 study of the extraordinary success of outdoor hospitals during the 1918 influenza epidemic suggested that during the next pandemic (I guess this one!) we should encourage “the public to spend as much time outdoors as possible,” as a public-health measure.
Source: Closing the Parks Is Ineffective Pandemic Theater – The Atlantic