BST2 and Ebola hemorrhagic fever: Tetherin (BST-2, CD-317) is a membrane bound protein involved in a non-specific, immune response to enveloped viruses, such as HIV-1 and Ebola (Neil, Zang & Bieniasz, 2008; Van Damme et al., 2008; Neil, 2013; Sauter, 2014).