Because we lack serology data on people in regions of Ebola outbreaks, it is not known whether there are infected individuals who remain asymptomatic; therefore, the degree of infectivity of the virus is unknown. (genomemedicine.biomedcentral.com)
Once we get through the public health crisis phase of things, that's going to be one of the important research questions: to look at differences in infectivity in one species and another. (scientificamerican.com)
What is the effect of the HIV - 2 accessory protein Vpx on HIV infectivity and the cell death pathway in lymphoid CD4 T cells? (gladstone.org)