The purpose of this study is to recruit and screen potential study subjects, mostly healthy volunteers, to determine if they are eligible for clinical trials of investigational products. This screening study also aims to characterize and analyze demographic information as well as laboratory and other medical findings in terms of how they may affect the eligibility of subjects for specific early phase clinical trials. All work will be conducted by the VRC Clinic of the National Institutes of Health or other IRB-approved sites that are collaborating with NIAID/VRC. Educational and recruitment materials on the investigational products and protocols will be
reviewed with and provided to subjects during participation in the screening protocol.