President Donald Trump said the US would help Vladimir Putin’s Russia as officials in Siberia quarantine hospitals, isolate workers and try to contain fears over a suspected pneumonic plague case tied to a lab worker’s death.
Trump addressed the situation Monday before leaving the White House for Nebraska, telling reporters that American officials had only recently been briefed on the illness Russian authorities have labeled pneumonia.
“Well, we’re looking at it very strongly. We just heard about it, and they call it pneumonia,” Trump told reporters.
He suggested that the disease has become more difficult to control because germs and microbes have changed over time.
“The germs have really become relatively stronger than they were, and things that used to work on pneumonia don’t work as well anymore,” Trump explained.
Q: Are you concerned about the outbreak in Russia?
Trump: I am. The pneumonia plague, if you call it. That's a disease we used to be able control. But somehow those microbes have gotten stronger and smarter. They're like an army. The germs have really become relatively stronger… pic.twitter.com/3VKrg2ydEP
— Acyn (@Acyn) October 5, 2026
Trump said he was sorry Russia was dealing with the illness and signaled that Washington was prepared to assist.
“I hate to see them having it,” Trump added. “It’s a rough disease. We used to be able to control, but somehow those microbes have gotten stronger and smarter.”
The offer came as Russia’s public health response in Irkutsk drew scrutiny from US officials, the World Health Organization and regional leaders over what exactly happened to Daria Shipilova, a 28-year-old lab technician.
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Shipilova reportedly became sick after a test tube containing plague bacteria broke at a Siberian research institute near Russia’s border with Mongolia.
Russian officials recorded her death as “pneumonia of unknown etiology” following several days in the hospital.
Medical personnel are monitoring more than 200 people, and four hospitals in Irkutsk have been closed for a three-week quarantine.
Local reports said as many as five hospitals in and around the city are under “epidemic” restrictions, with hundreds of patients and workers unable to leave.
Roughly 60 of Shipilova’s colleagues remain confined inside the institute while officials examine whether she had pneumonic plague, even as Moscow has tried to dampen fears of broader spread.
Pneumonic plague begins in the lungs and can pass through respiratory particles, unlike plague cases more commonly tied to bites from infected fleas or animals.
The disease can be cured with antibiotics if treatment starts quickly.
Russia’s health watchdog has challenged the account of a lab accident, saying there was no institute mishap and that expanded testing did not uncover microorganisms connected to Shipilova’s work.
The public account grew murkier after Alexei Tsydenov, the head of neighboring Buryatia, initially said Shipilova died of plague, then later changed course and said she only “possibly” contracted it.
Irkutsk officials canceled public gatherings, while police reportedly opened a probe into possible health safety violations.
Regional Governor Igor Kobzev described conditions as stable despite the hospital lockdowns, institute isolation and conflicting public statements.
In Washington, Marco Rubio said US officials were watching closely while noting the limited travel flow between the two countries.
“There’s very limited travel between the U.S. and Russia, obviously, but like anything else, something like that gets out, it could quickly spread,” Rubio told reporters.
.@SecRubio on the possible Russia plague outbreak: "We're watching and monitoring it closely. I don't think it's cause for alarm, but it is cause for focus." pic.twitter.com/pWbvfmV6uE
— Rapid Response 47 (@RapidResponse47) October 5, 2026
He said the suspected outbreak was not an immediate reason for alarm in the US, though it still required attention.
“I don’t think it’s cause for alarm, but it is cause for focus and a cause to just keep an eye on it, and we’re doing that,” Rubio added.
The State Department said the CDC and other interagency partners were helping follow the developments.
One US official pressed Moscow for clearer public information as key details remained unresolved.
“Many details have not been confirmed. We encourage Russian authorities to share accurate information quickly and openly,” the official stated.
The official also noted that plague can be treated with common antibiotics, especially when caught early, and appears naturally in many regions.
The World Health Organization told CNN it was coordinating with Russian health authorities to clarify the event, the circumstances, the tests underway and the results.
The WHO said the public risk “appears to be low.”
Kremlin spokesman Dmitry Peskov pointed Russians to Rospotrebnadzor, the state health watchdog, describing it as the “lead agency with expertise in this area.”
Peskov urged the public to “listen to official information” from the agency’s “highly qualified professionals.”
Yersinia pestis is the bacterium that causes plague, and people most often contract it through an infected host, including a flea or animal.
Russia has not confirmed a plague outbreak, but the Irkutsk response has kept international attention on the case, with hospitals locked down, institute workers isolated and US officials tracking the situation from Washington.
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