How the cluster unfolded

Kenya's first-ever Ebola cluster has grown to three confirmed cases of Bundibugyo ebolavirus. The first patient, a Kenyan man, fell ill in the Democratic Republic of the Congo, traveled by road to Uganda and then flew to Nairobi on 3 October, where he died in a hospital two days later.

On Wednesday, officials announced a second case: reportedly a 39-year-old man who is a family member of the first patient, who developed symptoms while he was quarantining. On Friday, officials announced the third case – a 65-year-old woman closely related to the first two patients.

Kenya's ministry of health credited contact tracing and quarantine measures for containing the cluster. About 108 people have been quarantined in Nairobi.

• •First patient: fell ill in DR Congo, traveled through Uganda by road
• •Second case: a close contact of the first patient, reportedly a 39-year-old male family member, who developed symptoms in quarantine
• •Third case: a 65-year-old woman closely related to the first two patients, announced Friday
• •About 108 people quarantined in Nairobi, according to the ministry of health

Allan Maleche, executive director of the organization Kelin, said the tracing effort appears to be holding. "The general feeling is that the contact tracing systems are working," he said, though he noted Kenyans are questioning the lapses that allowed a sick person to travel across multiple countries.

The US quarantine center at Laikipia

The United States created a controversial quarantine center at Kenya's Laikipia air base, intended for Americans returning from the Democratic Republic of the Congo. The facility sparked protests among locals, and a Kenyan court ordered a halt to the center; the litigation will be decided in November.

Maleche said Kenyans were left in the dark about the facility. "Many Kenyans were concerned about the fact that there was no information and people did not know why the quarantine place was being set up," he said. With the court case pending, he added, Kenyans remain "very cautious around any information that is being given by the government around Ebola".

The plan has also drawn questions from American experts. Jennifer Nuzzo, director of the pandemic center at Brown University school of public health, asked: "Is this still a viable solution for the US?". She pointed out that the US has its own treatment capacity: "American taxpayers built these units for precisely this purpose, and it's mind-boggling to me that we're going to leave them empty". In previous outbreaks, actively ill patients evacuated to such US centers recovered without further spread of the virus.

US funding cuts hamper the region

The Trump administration has carried out the demolition of the US Agency for International Development (USAID) and cuts to funding and staff at health agencies including the US CDC. On 1 October, the CDC closed HIV prevention offices in Angola and South Sudan, with plans to close offices in Zimbabwe as well. Programs were cut in DR Congo, where the Ebola outbreak is centered, and in countries like Kenya that are bracing for cases.

• •The US officially left the World Health Organization (WHO) in January, making it much harder to collaborate on outbreak response
• •Maleche said the withdrawal pulled out a substantial amount of funding and weakened the WHO's response
• •Maleche said the HIV funding cut had direct consequences: "It led to clinics closing. It led to a lot of anxiety among people."
• •The US is negotiating bilateral agreements with countries including Kenya, a process Maleche described as secretive: "It's not very clear what's the plan, who's rolling it out, and what will be involved."

The cuts have drawn opposition within the US itself. Senators Raphael Warnock, a Democrat from Georgia, and Bill Cassidy, a Republican from Louisiana, penned a letter in June to the Senate appropriations committee opposing the Trump administration's plans to cut back on HIV prevention. Warnock said the dismantling of USAID and the withdrawal from the WHO has "seriously weakened our ability to keep Americans safe from infectious disease".

"These cuts to global health funding have led to the erosion of international disease-monitoring infrastructure," Warnock said, infrastructure he described as catching threats like Ebola before they reach US shores.

Nuzzo argued the HIV work being cut is not single-purpose. "all of those capacities are things that you would use in other disease emergencies," she said, citing the movement of medicines and specimens and the conducting of lab tests.

Regional picture and travel limits

The cluster sits within a wider regional crisis. The DR Congo outbreak is the second-largest in history, having killed more than 4,300 and sickened more than 9,000 people in the region.

• •The DRC–Uganda border has been closed since May; Uganda was declared Ebola-free in August after earlier reporting 20 cases and two deaths
• •A French doctor who returned from DR Congo in June tested positive, and several Americans have been evacuated to Europe for treatment or monitoring
• •The US put travel bans in place from DRC and neighboring Uganda and South Sudan once the outbreak was detected in May

Maleche noted it would be "very ironic" if the US instituted travel bans, given its quarantine center in Kenya. The regional outbreak continues, with the court case over the Laikipia quarantine center due to be decided in November.