CD163 and infection: Similarly, to the genotype 2 strain MN-184 in the previous infection assay, the other two genotype 2 strains, SDSU-73 and Korea17, also showed a higher infection rate in PK15S10–CD163 as compared to PK15S1–CD163 (84.3% vs 38.7% and 34.93% vs 18.7%, respectively).