We don't know the actual number, and the minimum (i.e., the number we know of) is constantly in flux, so any number derived from those is wrong. The 'safe' perc

We don't know the actual number, and the minimum (i.e., the number we know of) is constantly in flux, so any number derived from those is wrong. The 'safe' percentage chance of someone with the virus being in the room with you is definitely arbitrary. So...arbitrary. Yes, you can run statistics to say that "well, we made a bunch of assumptions and came up with a specific number", but most of those assumptions are arbitrary.