|+Comparison between Cases and Non-cases
|-
!style="width:150px"|!style="width:200px"|Pre-exposure PRN ≤120<br>(GMT)!style="width:200px"|Pre-exposure PRN >120<br>(GMT)
|-
!Cases
|+Comparison among Non-cases
|-
!style="width:150px"|!style="width:200px"|Pre-exposure PRN 216-874!style="width:200px"|Pre-exposure PRN ≥1052
|-
!Post-exposure PRN<br>boosted†
|+Comparison among Non-cases
|-
!style="width:150px"|!style="width:200px"|Pre-exposure PRN <1052!style="width:200px"|Pre-exposure PRN ≥1052
|-
!Non-cases with<br>≥1 symptom‡