I too am baffled by the “cancelation” of natural immunity. The main issue (besides Zvi’s points) with whether to allow for natural immunity as an alternative (documented infection and recovery) is that we don’t want to create perverse incentives to have “covid parties” (yeah, that’s a thing). But that ought to be surmountable by having a cutoff—you need to have recovered prior to a certain date (in the US, maybe middle of August?), and in order to get a vax passport out of it, you need to get an antibody test at your own expense. In other words, it should be more a matter of figuring out the game theory than biology, which seems to point towards natural immunity pretty much working. I do think that allowing for immunity through natural infection would help to keep the peace.
I too am baffled by the “cancelation” of natural immunity. The main issue (besides Zvi’s points) with whether to allow for natural immunity as an alternative (documented infection and recovery) is that we don’t want to create perverse incentives to have “covid parties” (yeah, that’s a thing). But that ought to be surmountable by having a cutoff—you need to have recovered prior to a certain date (in the US, maybe middle of August?), and in order to get a vax passport out of it, you need to get an antibody test at your own expense. In other words, it should be more a matter of figuring out the game theory than biology, which seems to point towards natural immunity pretty much working. I do think that allowing for immunity through natural infection would help to keep the peace.