The United States is looking to set up a quarantine facility in Kenya for U.S. nationals exposed to Ebola or having tested positive for the virus, a proposal yet to be approved by the Kenyan government, The Wall Street Journal reported on May 26, quoting sources familiar with the matter. This comes as the Democratic Republic of the Congo reported 1,011 confirmed and suspected Ebola cases with 233 fatalities across its eastern Ituri, North Kivu and South Kivu provinces as of May 26, while the University of Oxford's Pandemic Sciences Institute said clinical trials for an experimental Ebola vaccine could begin in two to three months.

On May 17, the World Health Organization designated the ongoing Ebola outbreak in eastern Congo a "public health emergency of international concern." There are vaccines against the Zaire strain, which is responsible for 15 of the 17 Ebola outbreaks Congo has faced since 1976, but the current outbreak is caused by the Bundibugyo strain, for which there are currently no vaccines or therapeutics.