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Total number of RSV samples during each season/year included in 419 articles selected from the literature. Samples reported from a given season in the Northern Hemisphere [for example, 1980–1981] and samples identified in the subsequent calendar year in the Southern Hemisphere [for example, 1981]) are shown in the same season. Total samples reported in the graph: 76,668 (63,980 for the Northern Hemisphere and 12,688 for the Southern Hemisphere).
