NEJM controlled study on Marines in monitored setting- enforced rules on masks, social distancing, no personal hand held electronics, nightly sanitization, etc. The virus swept through the subjects like wildfire*. The uncontrolled subjects had a lower infection rate. Bars and restaurants isn't the problem. Living with other people is. https://www.nejm.org/doi/full/10.1056/NEJMoa2029717 * no hospitalizations. They're 18-20 yo men. No real risk.