WHO calls the Irkutsk institute death a low public risk and asks Russia for the tests

The World Health Organization said on Monday that the public health risk to the general population from the death of a worker at a plague research institute in Irkutsk appears to be low. The judgement, given to CNN, rests on unofficial information. WHO said it was in contact with Russian health authorities to verify the event, the circumstances, the laboratory tests under way, and the results.

The worker is Darya Shipilova, 28, named by local media as a laboratory employee at the Irkutsk Anti-plague Research Institute of Siberia and the Far East. She fell ill at work and died on the night of 2 October at a regional hospital in Shelekhov, the town next to the institute. Rospotrebnadzor, the federal consumer-health watchdog, says she died of pneumonia of unknown origin, and that no micro-organism linked to her professional duties was found in samples from the patient. The agency says the epidemiological situation in the region is stable.

That official line has not stopped local precautions. Radio Free Europe/Radio Liberty reported on Monday that several hospitals in Irkutsk had been placed under quarantine, and that staff from Shipilova's institute had been kept inside the building since 2 October. Alexey Tsydenov, head of neighbouring Buryatia, wrote that she had died of plague, then edited the post to say she had possibly died of it. Kremlin spokesman Dmitry Peskov said on Monday that people should rely on Rospotrebnadzor rather than on rumour.

Kazakhstan's health ministry has treated the file as a border question even while calling the risk very low. It said the situation was being monitored and that sanitary and quarantine controls were in place at state border crossings. Irkutsk is not on the Kazakh frontier, but the rail and road routes south from Siberia pass through checkpoints the ministry can actually staff. A low-risk judgement and a checkpoint regime are not in conflict. They are how a neighbour behaves when the diagnosis is still the phrase pneumonia of unknown origin.

The institute is one of the old anti-plague network built across the Soviet Union to watch endemic foci of Yersinia pestis in rodents. Work of that kind handles the organism on purpose. A death on the staff, followed by a finding of no work-related organism, is either a reassurance or a result that later tests can revise. WHO's decision to say the population risk looks low, and to say in the same sentence that the information is unofficial, keeps both possibilities open. The agency has not confirmed a pathogen. It has also not closed the case.

US secretary of state Marco Rubio said on Monday, before leaving for Europe, that Washington was watching and did not see cause for alarm, and did see cause to keep an eye on it. The WHO sentence is the multilateral version of that posture: contact with the Russian side, no confirmed diagnosis, a provisional low risk, and a request for the laboratory results. Until those results are public, the operational facts are the ones on the ground. Hospitals in Irkutsk under quarantine. Institute staff held in the building since the night she died. Checks on the Kazakh border. A federal agency that says the organism she worked with was not in her samples.