The recombinant vesicular stomatitis virus-vectored Zaire Ebola virus glycoprotein (rVSVΔG-ZEBOV-GP) vaccine, while effective and well-tolerated, exhibits notable reactogenicity, manifesting in expected adverse events (AEs), such as fever, headache, and pain, along with rare, unexpected AEs, including skin lesions, cutaneous vasculitis, and transient arthritis. The gene discussed is ART4; the disease is transient arthritis.