This medium post provides a pretty good answer for this question: https://medium.com/swlh/so-youre-going-outside-a-physics-based-coronavirus-infection-risk-estimator-for-leaving-the-house-d7dcae2746c0
And see also the related calculator: https://sygo.mardillu.com/
This medium post provides a pretty good answer for this question: https://medium.com/swlh/so-youre-going-outside-a-physics-based-coronavirus-infection-risk-estimator-for-leaving-the-house-d7dcae2746c0
And see also the related calculator: https://sygo.mardillu.com/