Appendix Table 2:

Summary of criteria for article inclusion.

Inclusion Criteria		Exclusion Criteria
Type of Study	Cluster randomized trial	Type of Study	Cohort, cross sectional, case study, experimental, metaanalysis, systematic review, rapid review
Participants	Humans	Participants	Animals/non-humans
Setting	Community or public	Setting	Healthcare or laboratory
Language	English	Language	Non-English
Abstract	Available	Abstract	Not available
Outcome	ILI symptoms or laboratory-confirmed respiratory virus	Outcome	No measure of ILI symptoms or laboratory-confirmed respiratory virus