If we convert the measure used in finding 2 (relative risk of reinfection) to finding 1's (relative protection), then the study found that natural immunity from Delta variant gives 60% protection against Omicron; roughly double the vaccine's protection.
Unfortunately, no stat was given for natural immunity's protection against hospitalization.
From finding 1: individuals who received two doses of the Pfizer-BioNTech vaccine had 33% protection against infection, relative to the unvaccinated
From finding 2: People who were infected with COVID-19 in South Africa’s third (Delta) wave face a 40% relative risk of reinfection with Omicron
Am I reading this right? Wonder why they used different metrics?
0: https://www.discovery.co.za/corporate/news-room#/pressreleas...