Figure 4

Co-culture of breast milk- and blood-cell viral-culture supernatants with CD4⁺ T cells. The infectivity of virus secreted into culture supernatants was tested after 18 h of incubation by co culturing with phytohemagglutinin-activated CD4⁺ T cells from healthy blood donors. A) HIV-1 RNA quantification in CD4⁺ T co-culture with breast milk cell supernatants. B) HIV-1 RNA quantification in CD4⁺ T co-culture with blood cell supernatants.