Other factors that differed between the pre-and post-Ebola time periods were: Hospitalizations (22.1% [306/1384] versus 8.8% [98/1012], p < 0.001); percentage of presenting females (59.0% [811/1375] versus 54.7% [583/1065], p = 0.036); Ag−/IgM+ serostatus (36.4% [504/1384] versus 16.5% [183/1110], p < 0.001); percentage of IgG+ subjects (21.6% [295/1365] versus 43.0% [378/879], p < 0.001); and percentage of presentations during the rainy season (55.4% [767/1384] versus 39.0% [428/1097], p < 0.001). The gene discussed is CD40LG; the disease is Ebola hemorrhagic fever.