Both CD163 and CD206 have recently been detected in blood samples, and the levels have been found to be closely associated with several disease states including infections and some liver diseases (Møller, 2012; Rødgaard-Hansen et al., 2014; Andersen et al., 2018; Loonen et al., 2019; Rødgaard-Hansen et al., 2015). This evidence concerns the gene MRC1 and infection.