Not everyone goes to the doctor for a scratchy throat (primary symptom of Omicron, by the way), and as a result a huge number of data points are quickly excluded from that “1%” stat.
We can say with fairly high confidence that the natural immunity rate is fairly low due to the infection rate of the unvaccinated vs. the vaccinated. If any significant portion of the unvaccinated had natural immunity, then the gap between the vaccinated and the unvaccinated would close since natural immunity actually confers more protection.
