Study: .02% Outdoor Virus Transmission Rate (2 People out of 7,000)
A recent paper from China reviewed over 7000 cases from 320 cities in China
Our study does not rule out the outdoor transmission of the virus. However, among our 7,324 identified cases in China with sufficient descriptions, only one outdoor outbreak involving two cases occurred in a village in Shangqiu, Henan. A 27-year-old man had a conversation outdoors with an individual who had returned from Wuhan on 25 January and had the onset of symptoms on 1 February.
Home outbreaks were the dominant category (254 of 318 outbreaks; 79.9%), followed by transport (108; 34.0%; note that many outbreaks involved more than one venue category).
There has been a LOT of literature (not even too recent!) about how even superspreaders don't spread very well outdoors. If we can verify that, could be a big part of opening up certain places (conceivably, even Disneyland with appropriate distancing).
A team of three medical doctors and biologists from Harvard also wrote that "outdoors, the virus quickly disperses in the air," so the risk of becoming infected by someone running or walking past you is likely very low.
During the 1918 flu pandemic, experiments with open-air hospitals were highly successful at reducing the extent to which health care workers got infected.
Florida's Governor did not say the risk of spreading coronavirus in a park is non-existent but cited a Department of Homeland Security Bio-defense Lab study that showed that ultraviolet radiation that mimicked natural sunlight destroys the new coronavirus.
This conclusion is still up for debate. However, there is proof that vitamin D from sunlight helps your immune system.
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