A cohort study from Cleveland Ohio Health System, monitors their staff vaccination and infection status for Covid-19 for 10 months. Of the 2154 SARS-CoV-2 infections during the study period, 2139 (99.3%) occurred among those not previously infected who remained unvaccinated or were waiting to get vaccinated, and 15 (0.7%) occurred among those not previously infected who were vaccinated.
Not one of the 2579 previously infected subjects had a SARS-CoV-2 infection, including 1359 who remained unvaccinated throughout the duration of the study. The statistics of the study are highly significant at P<0.001.
In their conclusions, they said that individuals who have had SARS-CoV-2 infection are “unlikely” to benefit from COVID-19 vaccination, and vaccines can be safely prioritized to those who have not been infected before.
As of 1st July the study wasnt peer reviewed and the source is an allowed pre-print by the authors.
