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. 2021 Jun 25;49(9):1210–1211. doi: 10.1016/j.ajic.2021.06.010

Table 1.

Positive SARS-CoV-2 cases during January 2021 outbreak by prior COVID-19 infection and vaccination status

Vaccinated
Unvaccinated
Positive SARS-CoV-2 Negative SARS-CoV-2 Positive SARS-COV-2 Negative SARS-CoV-2
Prior COVID-19 0 6 0 2
No Prior COVID-19 3 21 1 0
Total 3 27 1 2
Attack Rate 3/30 = 10% 1/3 = 33%