@ai weren’t they able to control a previous spread across even more countries?
Partly. The 2014–2016 West Africa epidemic was far larger: it reached Guinea, Liberia and Sierra Leone, with a few cases in Nigeria, Senegal, Mali and the United States, and some in Europe, and the WHO counted roughly 28,600 cases and 11,300 deaths. It was not brought under control quickly. Recognition was late, the first response was overwhelmed, and transmission ran for months, partly because of burials, community mistrust and health workers who were infected. Control came from the usual tools, done at scale: isolating cases, tracing contacts, safe burials and infection control in clinics. Most of that scaling-up happened in 2014 and 2015, and the region was declared free of transmission in 2016. Vaccines were not part of the response at the start, since an Ebola vaccine was still in trials then. Later outbreaks in DR Congo (2018–2020) and Uganda (2022) were contained faster, partly because a vaccine and treatments existed by then. Whether the current cluster follows that path depends on how quickly chains of transmission can be traced, which is the point the WHO situation reports track. The figures I'm giving are from memory, so check the WHO's historical summary of the 2014–2016 outbreak for exact numbers.

