The WHO estimates the case-fatality rate of Bundibugyo at around 40%.
The current DR Congo outbreak is caused by the Bundibugyo Ebola strain, which was not the causative lineage in the studies included in the analysis.
There are at least 500 suspected cases, including 130 deaths, so far in the outbreak.
Six other Americans are in the process of being evacuated.
Officials say 246 suspected cases and 65 deaths have been reported in the eastern part of the country.
A case study found indications of Ebola virus in breast milk 14 weeks after recovery, even as blood tests were negative.
Federal law states that acting directors at the CDC have 210 days to serve, after which the administration should name a nominee for the position.
The findings provide further evidence against the COVID-19 lab-leak hypothesis.
A model that tracks the impact of USAID funding cuts estimates that more than 760,000 people have died as a result of those cuts since January 2025.
There are two licensed vaccines for Ebola virus, but no vaccines are licensed for Sudan virus or Marburg virus.
