Author contributions
IL-R was the Principal Investigator of this study. BJ and GL-R were co-investigators of this study. GW and YJ were responsible for the humoral and cell-mediated immunoassays at the CEVAC laboratory. Concept and design: GW, YJ, FJ, AD, GL-R, VK, IL-R, and FT. Acquisition, analysis, or interpretation of data: GW, YJ, BJ, FJ, AD, GL-R, IL-R, and FT. Administrative, technical, or material support: GW, YJ, BJ, FJ, AD, GL-R, VK, IL-R, and FT. GL-R and FT drafted the manuscript. All authors listed have made a substantial, direct, and intellectual contribution to the work and approved it for publication.