Ebola outbreak: WHO declares emergency, US restricts travel, American infected

Four Ebola virus strains cause disease in humans, with Zaire, Sudan, and Bundibugyo responsible for large outbreaks. Zaire is the most common strain, and treatments and vaccines have been developed for it. The viruses spill over from animals, including non-human primates and bats, and cause severe hemorrhagic fever with diarrhea, vomiting, and bleeding. Person-to-person spread occurs through contact with bodily fluids. Symptoms develop between two and 21 days after exposure, most often eight to 10 days. The CDC implemented travel restrictions for Americans arriving from the DRC, Uganda, and South Sudan, including screening and monitoring, and barred entry for non-US passport holders who traveled there in the past 21 days. One American exposed in the DRC developed symptoms and tested positive, and the CDC arranged transfer to Germany for care along with six other exposed Americans.

"There are four virus strains known to cause Ebola disease in humans, and three have caused large outbreaks (Zaire, Sudan, and Bundibugyo). The most common strain is Zaire, for which treatments and vaccines have been developed. The viruses spill over from animals, including non-human primates and bats, and cause severe hemorrhagic fever, marked by diarrhea, vomiting, and bleeding."

"Person-to-person spread occurs via contact with bodily fluids and symptoms can develop between two and 21 days-though most often eight to 10 days-after an exposure. On Monday morning, the CDC announced on its website that it is implementing new travel restrictions, including screening and monitoring Americans arriving from DRC, Uganda, and South Sudan, while also barring the entry of non-US passport holders who have traveled in those countries in the past 21 days."

"Additionally, in a CDC press briefing on Monday afternoon, Captain Satish Pillai, incident manager for CDC's Ebola response, said that one American in the DRC has been infected after being exposed as part of their work there. The person developed symptoms over the weekend and tested positive late Sunday. The CDC is now working to transfer that person, along with six other Americans, to Germany, where they will receive care."

"Serge, a Christian missionary organization, announced that the infected person is Dr. Peter Stafford, who has been working in the Nyankunde Hospital in Bunia, DRC, since 2023. The other six people the CDC is working to relocate are his wife, Dr. Rebekah Stafford, the couple's four children, and a third doctor with the organization, Dr. Patrick LaRochelle. All three doctors had exposures, the organization said, but Rebekah Stafford and LaRochelle are currently asymptomatic. Pillai noted that the CDC considers the risk to the American public to be low."

Read at Ars Technica