. Supermatrix reflecting a combination of harvests plots for different interventions and reported outcomes The height of bars denotes the study size (total number of participants). The numbers below bars indicate the reference numbers of the corresponding studies. The reference list of the included studies is reported in Table S3. a, Refers to total (overall) score reported in the article [11, 21, 22, 29, 31, 37, 46, 50]. b, Refers to one audience of one subset of questions [4]. c, Refers to the period from baseline to follow-up [1]. d, Refers to knowledge about symptoms that may require the use of an antibiotic [21]. e, Refers to knowledge about symptomatic management of upper respiratory tract infections symptoms [21]. f, Refers to all audiences for a subset of questions [4]. g, Refers to one audience for one subset of questions [4]. h, Refers to the results for female community health volunteers population [37]. i, Refers to the results for healthcare professionals population [37]. j, Refers to the results for media personal and healthcare professionals population [37]. k, Refers to subgroup analysis (special population in the catchment area) [11]. l, Refers to patients of Indian ethnicity [46]. m, Refers to the results for commercial managed care organizations population [29]. n, Refers to cost savings [29]. o, Refers to the campaigns run in childcare facilities [13]. p, Refers to the campaigns run in clinics and community organizations [13]. *Denotes adults; #denotes adults and children together; § denotes children; ‡ denotes adolescents (aged 14–16 years).