CD209 and infection: Running the additional structural protein viral strains on the 3t3 DC-SIGN+ cell-mediated trans-infection assay and normalizing each strain’s per molar luciferase signal (Figure 7B) to their respective hACE2-mediated direct infectivity per molar luciferase signal (Figure 7A) revealed no significant difference between the strains’ propensity to undergo trans-infection (Figure 7C and Figure S9), indicating that there is relatively little interaction between DC-SIGN and the other SARS-CoV-2 surface glycoproteins.