Inactivated parenteral influenza vaccine probably leads to lower influenza assessed by laboratory confirmation Timing of assessment:… compared with placebo or 'do nothing' (moderate certainty).
Inactivated parenteral influenza vaccine probably leads to lower influenza‐like illness assessed by subjective report Timing of… compared with placebo or 'do nothing' (moderate certainty).
Inactivated parenteral influenza vaccine showed no clear difference in hospitalisations Timing of assessment: single influenza season compared with placebo or 'do nothing' (low certainty).
Inactivated parenteral influenza vaccine leads to higher fever assessed by subjective report Timing of assessment: single… compared with placebo or 'do nothing' (high certainty).
Inactivated parenteral influenza vaccine showed no clear difference in nausea or vomiting assessed by subjective report Timing of… compared with placebo or 'do nothing' (low certainty).