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. 2021 Apr 23;18(4):e1003561. doi: 10.1371/journal.pmed.1003561

Fig 1. Levels of chloroquine resistance against Plasmodium vivax from 1985–2019.

Fig 1

The data were exported from the WWARN Vivax Surveyor tool at https://www.wwarn.org/tracking-resistance/vivax-surveyor. Evidence for chloroquine resistance comes from P. vivax clinical trials published from 1985–2019. Some trials are from different years in the same area; this figure does not specify the change in chloroquine resistance pattern over time. CQS: Chloroquine sensitive, Category 1: very suggestive of resistance, Category 2: suggestive of resistance, Category 3: potential evidence of resistance.