Table 3 summarizes the findings of included studies, structured by different types of outcomes: health, social and behavioural outcomes (e.g. mortality, societal change, health behaviour), health promotion outcomes (e.g. knowledge, attitudes, behavioural intentions) and exposure outcomes (e.g. recall, understanding, onward transmission). More detailed results of included studies are shown in the Supplementary Table S3.

Table 3.

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Results of included studies

Table 3.

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Results of included studies