A study of 7,000 people who were positive for coronavirus was done to trace how they became infected. While in close proximity outdoors, two became infected. All others were infected indoors by the typical known sources. That's two out of 7,000. Also, think of what happens to a lungful of exhaled smoke outdoors and how quickly it dissipates with the breeze to get an idea of how a contagious person's breath would be dispersed. As a retired RN, I'm a helluva lot more worried about being infected by careless people inside Vons and Target than by passing somebody on the trail unless that hiker/runner is coughing or panting in my face.
