NCR2 and infection: Again, our results showed a statistically significant increase of HIV-1 viral load in CD4pos T cells infected with HIV-1 IIIB pre-incubated with Siglec-7-Fc chimera compared to their counterpart infected with untreated HIV-1 strains, while pre-incubation of viral isolates with NKp44 fusion protein did not enhance the degree of infection of CD4pos T cells (Figure 3C).