On 15 May 2026, DRC and Uganda declared an Ebola (Bundibugyo virus) outbreak. WHO declared a PHEIC on 16 May 2026 — the 17th DRC Ebola outbreak. As of 24 May, >1,010 cases and 130 deaths were reported across both countries. This document estimates R₀ and Rₜ using reported case data reconstructed from WHO, CDC, and ECDC situation reports