Figure 2.

Sequencing effort for SARS-CoV-2.

Countries are ranked by three indicators describing sequencing efforts. “Fraction” is the number of viral sequences of samples collected by the time the cumulative number of COVID-19 cases had reached 1000 in each country. Because samples were collected before disease confirmation and positive samples could be identified retrospectively, the value could be larger than 1000. “Timeliness” is the number of sequences that had been published by the time the cumulative number of COVID-19 cases had reached 1000 in each country. “Openness” is the time gap (days) between sample collection and sequence data submission for the first 100 sequences in each country. Sequence data for which the collection and submission dates are unknown were excluded from the analysis. Darker colors indicate better performances.