If you live completely alone and don't leave home, sure, testing doesn't really apply. In my house, if someone is sick and visiting the kitchen every couple ho

If you live completely alone and don't leave home, sure, testing doesn't really apply. In my house, if someone is sick and visiting the kitchen every couple hours hacking up a lung, but won't spend 3 minutes to crack open one of those free government tests, that would be a bit rude. Catching any virus sucks, so I'd appreciate an FYI about if the air they're exhaling has the virility to infect an average of 6 people or an average of 1 person (or whatever the latest research has determined the wildly high R-value of infectiousness to be of covid vs a cold). The difference affects how active I need to be to avoid catching a bug.