Specific anti-RVFV immunoglobulin M (IgM) antibodies, biomarkers of a recent infection, appear after 5–6 days of infection and last for a few months, while anti-RVFV immunoglobulin G (IgG) antibodies, which indicate past infection, appear after 1–2 weeks and last for many years [35]. The gene discussed is CD40LG; the disease is infection.