Going from 50% to 75% to 88% to 94% to 97% to 99% to 99.5% reduction in risk carries an exponential increase in cost. Bringing risk to zero isn't a reasonable -

Going from 50% to 75% to 88% to 94% to 97% to 99% to 99.5% reduction in risk carries an exponential increase in cost. Bringing risk to zero isn't a reasonable -- or possible -- goal, but how much this should decrease depends on individual and cultural profiles. If you think one risk profile is reasonable, and you're interacting with someone who has a much more conservative profile and putting them at risks they consider unreasonable, you're probably being a dick (and vice-versa). That's not just diseases -- it's everything from gun safety to outdoors safety to sparring. If you've been exposed to covid, and are asymptomatic, you should take reasonable precautions. For introverts, that might be staying at home. For others, it might be testing. For others, it might be using a high-filtration mask. It sort of depends on your preferences. Asymptomatic spread is pretty common, and it's not unreasonable to try to prevent it. If you've been exposed to covid and are symptomatic, you should take stronger precautions.