Anti-Virus Protein in Humans May Resist Transmission of HIV-1 Precursor from Chimps (image) PLOS Share Print E-Mail Caption This is a model of SIVcpz cross species transmission to human. Credit Zhang Z, et al. (2017) Usage Restrictions CC-BY Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.