The other commenter already pointed out that the 1.27% isn't really a meaningful data point around reinfection risk (beyond the time issue, it's also a proporti

The other commenter already pointed out that the 1.27% isn't really a meaningful data point around reinfection risk (beyond the time issue, it's also a proportion of positives, which doesn't get at what we're really interested in: incidence among those with prior infection). But, more broadly, I wasn't referring to a particular study, but rather the general public health surveillance that's happening in South Africa. There's an incredible rise in both cases and hospitalizations in South Africa, in the face of a relatively low vaccination rate (~30%, although this is 10x higher than most of the rest of Africa) with a relatively high estimated prior infection rate (vaccination + prior infection totaling ~90%). One hypothesis that would explain that is that prior infection offers minimal protection from omicron. That's the hunch that epidemiologists and others start exploring from with studies that will provide stronger evidence in favor or against. There's no answers right now, just data points that need to be taken in the context of uncertainty :-/