CD209 and infection: Thus, each mutant appeared to have the same propensity to undergo DC-SIGN-mediated trans-infection as the wild-type strain pseudovirus: the N17/61/74Q and N122/149/234Q strains displayed a trans-infection propensity with a median = 48.1% (avg 43.0%) and a median = 35.4% (avg 48.0%) of direct infection, respectively.