This is a super exciting finding, other discussion here: https://news.ycombinator.com/item?id=29999807 https://news.ycombinator.com/item?id=29999807 I find the

This is a super exciting finding, other discussion here: https://news.ycombinator.com/item?id=29999807 https://news.ycombinator.com/item?id=29999807 I find the final paragraph amazing of the mmwr: > Among the two cohorts with a previous COVID-19 diagnosis, no consistent incidence gradient by time since the previous diagnosis was observed (Supplementary Figure 3, https://stacks.cdc.gov/view/cdc/113253 https://stacks.cdc.gov/view/cdc/113253). When the vaccinated cohorts were stratified by the vaccine product received, among vaccinated persons without a previous COVID-19 diagnosis, the highest incidences were observed among persons receiving the Janssen (Johnson & Johnson), followed by Pfizer-BioNTech, then Moderna vaccines (Supplementary Figure 4, https://stacks.cdc.gov/view/cdc/113253 https://stacks.cdc.gov/view/cdc/113253). No pattern by product was observed among vaccinated persons with a previous COVID-19 diagnosis. 1) Natural immunity did not appear to wane over the study interval. (No difference in Hazard Ratio when stratifying by time since infection) 2) Vaccine only immunity showed major differences stratified across brands and time but if the person also had prior exposure then all differences disappear. Seems to indicate natural immunity is the heavy lifter here. Of course they go on to blanket recommend vaccines but of course that was going to be the conclusion somehow.