I think antivaxxers could plausibly pose a higher infection risk because they’re unusually likely to hang out with other unvaccinated people, or to do other bad decisionmaking. Someone who’s unvaccinated because they’re scared of needles might still make good decisions otherwise—like they might stay home if they’re feeling a sniffle, or test themselves for COVID if their housemate is sick.
Also, you want to exclude unvaccinated people because they pose an infection risk, so you already wanted to exclude anyone who posts “I hate vaccines” on Facebook. You’re just worried about the incentives or selection effects if you use an honour system, because some people will lie and say they’re vaccinated when they aren’t. I’m suggesting that the incentives or selection effects aren’t as negative if you only require silence, so nobody has to actually lie.
I think antivaxxers could plausibly pose a higher infection risk because they’re unusually likely to hang out with other unvaccinated people, or to do other bad decisionmaking. Someone who’s unvaccinated because they’re scared of needles might still make good decisions otherwise—like they might stay home if they’re feeling a sniffle, or test themselves for COVID if their housemate is sick.
Also, you want to exclude unvaccinated people because they pose an infection risk, so you already wanted to exclude anyone who posts “I hate vaccines” on Facebook. You’re just worried about the incentives or selection effects if you use an honour system, because some people will lie and say they’re vaccinated when they aren’t. I’m suggesting that the incentives or selection effects aren’t as negative if you only require silence, so nobody has to actually lie.