Fig. 1: Weekly time series of environmental measurements and influenza activity in 46 states of the USA during 2010–2015. | Nature Communications

Fig. 1: Weekly time series of environmental measurements and influenza activity in 46 states of the USA during 2010–2015.

From: Ozone as an environmental driver of influenza

Fig. 1

Influenza activity is indicated by the variable “Flu” which is the product of two proportions: the proportion of influenza-like-illness cases among all clinical consultations in the community and the proportion of laboratory confirmed influenza-positive specimens among all specimens tested. Long stretches of 0 values for “Flu” in non-influenza season (June to September), shaded in gray columns, contain little information for causal inference and thus are omitted from data analysis.

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