My default assumption at this point is the longer you breath air contaminated with aerosols carrying the virus the higher your chance of being infected. But the

My default assumption at this point is the longer you breath air contaminated with aerosols carrying the virus the higher your chance of being infected. But the actual statistics behind this are basically unknown. If there a real threshold effect or is that a statistical artifact. No one knows but there are hints that severity is related to exposure. Also suspect one large droplet likely can infect you by itself. I'm going with, avoid sharing confined spaces with people outside my household. And stay far away from people not wearing masks.