Inactivated influenza vaccine vs placebo or no intervention: Influenza‐like illness
Inactivated influenza vaccine probably leads to lower influenza‐like illness assessed by subjective report compared with placebo or do nothing (moderate certainty).
What each review found
Include earlier review versions| Finding | Effect | Studies | GRADE certainty |
|---|---|---|---|
Inactivated influenza vaccine vs placebo or do nothing Influenza‐like illness assessed by subjective report · healthy, community‐dwelling children older than 2 years of age Inactivated influenza vaccine probably leads to lower influenza‐like illness assessed by subjective report compared with placebo or do nothing (moderate certainty). Vaccines for preventing influenza in healthy children (2018) · Cochrane Headline outcomes only | RR 0.72 [0.65, 0.79] | 4 studies · 19044 participants | Moderate |
Findings are shown side by side, never pooled across reviews.
The reviews
| Review | Searched up to | Included studies | AMSTAR 2 |
|---|---|---|---|
| Vaccines for preventing influenza in healthy children 2018 · Cochrane Headline outcomes only | Not reported | list not extracted yet | Not assessed |
Studies behind the findings
None of these reviews ties its included studies to this outcome in the data here. Cochrane reviews and reviews with headline outcomes only do not list their studies yet.
How reviews are matched to this question
Reviews word the same question differently. Four decision models (TypeSafe's Jev, Liquid AI's d1-ultra, SubQ Snap and Baseten's Elephant) judged each wording of the population, intervention, comparator and outcome against the others; two wordings count as the same when at least three of them agree and none clearly disagrees, and findings count as this question only when all four elements match. Timing, setting and subgroup never split a question: they are shown on each finding.