Fig. 2From: Utility of ultra-sensitive qPCR to detect Plasmodium falciparum and Plasmodium vivax infections under different transmission intensitiesAge trends in P. vivax positivity and parasite density in Thailand, Brazil and PNG. P. vivax infections detected by Pv_18S rRNA qPCR and Pv_mtCOX1 us-qPCR (white circles) and P. vivax infections only detected by Pv_mtCOX1 us-qPCR (black circles). a–c P. vivax positivity by age group with 95% confidence intervals (black vertical lines). d–f Log10 transformed P. vivax parasite density by Pv_mtCOX1 us-qPCR per age group with median Pv_mtCOX1 copy numbers (horizontal lines)Back to article page