Here's a link to a very revealing study from 2010 that demonstrated quite well the effects of Silver Nanoparticles on HIV-1 transmission. Very impressive and worth a read.
"Conclusions
A formulation of PVP-coated AgNPs homogenized in Replens gel acts rapidly to inhibit HIV-1 transmission after 1 min and offers long-lasting protection of the cervical tissue from infection for 48 h, with no evidence of cytotoxicity observed in the explants."
