Oil-in-water emulsion adjuvants for pediatric influenza vaccines: a systematic review and meta-analysis.

Compared with participants in non-adjuvanted arms, those in adjuvanted arms had a slightly higher frequency of neurological events during the follow-up period, but the difference did not reach statistical significance due to the very low frequency of events (weighted risk ratio estimate: 1.4; 95% CI: 0.4–4.3; I 2 : 0%; Fig. 10 ).

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