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. 2021 Jun 7;21(9):1210–1211. doi: 10.1016/S1473-3099(21)00273-5

Table.

Expected and actual rates of Bell's palsy in COVID-19 mRNA vaccine trials

Expected occurrence during mRNA vaccine trials (recipients) Actual occurrence during mRNA vaccine trials (recipients) Actual occurrence during mRNA vaccine trials (doses)
Rate per 100 000* ∼3 to 7 cases (15–30 cases per year) ∼21 cases (89 cases per year) ∼10 cases (44 cases per year)
Ratio 1:14 285 to 1:28 570 1:5000 1:10 000
*

Rate per 100 000 recipients for the second and third columns and per 100 000 doses for the fourth column.