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. 2020 Oct 22;21(2):193–202. doi: 10.1016/S1473-3099(20)30785-4

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Frequency (A) and order (B) of introducing and lifting NPIs

(A) Each number denotes the frequency of the co-occurrence of NPIs in the x and y axes. Numbers on the diagonal (from bottom left to top right) denote the frequency of the occurrence of NPIs (with and without co-occurrence). (B) Each number in the graph denotes the percentage of NPI in the y axis that occurred earlier than the NPI in the x axis among countries with both NPIs ordered or lifted. NPIs are ranked from earliest to latest based on the mean percentage of the row. NPI=non-pharmaceutical intervention.