Table 1.

Risk population and blood tests in China, 2011–2020.

Year	Total population (10,000)	Risk population (million) #	No. of blood examinations for routine malaria surveillance (10,000) *	No. of positive blood examinations	Annual blood test rate (%) ※	Positive rate (%)
2011	134,735	281	740.4	3,491	0.550	0.05
2012	135,404	171	689.1	2,556	0.509	0.04
2013	136,072	8.18	562.2	4,002	0.413	0.07
2014	136,782	8.57	441.5	2,978	0.323	0.07
2015	137,462	5.51	407.7	3,160	0.297	0.08
2016	138,271	0.35	320.6	3,236	0.232	0.10
2017	139,008	0.42	233.2	2,796	0.168	0.12
2018	139,538	2.97	191.6	2,597	0.137	0.14
2019	140,005	0.60	168.6	2,612	0.120	0.15
2020	138,111	0.30	127.4	1,084	0.092	0.08

^#It is the population in active foci and foci with risk of transmission.

*The number of samples detected by microscopic examination and RDTs is included.

^※The number of people at risk varies greatly according to the number of people in active foci and foci with risk of transmission, and the annual blood examination rate calculated with the risk population as the denominator is easily affected.