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Should I be worried about Irkutsk Oblast plague scare?

Updated · Graded from official assessments; nothing here is medical advice.

Irkutsk Oblast plague scare · moderate

If you are in the affected area no assessment
No agency has published a risk assessment for people in Irkutsk Oblast. On 7 October, Russian authorities cited by media reports said there were no confirmed or suspected plague cases, while WHO was reported to be seeking clarification about a second pneumonia case.
If you are elsewhere in the same country or region no assessment
No agency has published a risk assessment for people elsewhere in Russia. The most relevant official reporting available says Russian authorities reported 0 confirmed and 0 suspected plague cases in Irkutsk Oblast on 7 October, and WHO asked Russia for more information.
If you are travelling there soon no assessment
No agency in the cited material has published a graded travel risk assessment for this incident. Media reports say the U.S. Embassy urged U.S. citizens to leave Russia on 7 October, while Russian authorities continued to say there were no confirmed or suspected plague cases in Irkutsk Oblast.
If you are elsewhere in the world no assessment
No agency has published an assessment for people outside Russia. WHO was reported on 7 October to be asking Russia to clarify reports about a possible second pneumonia case, and no event-specific WHO outbreak notice is available here.

What is happening

Reports since 6 October have centered on a possible plague-linked pneumonia incident at the Irkutsk Anti-Plague Research Institute in Irkutsk Oblast, Russia, but there is still no official confirmation of plague as of 7 October. Officials cited in the reporting, including Rospotrebnadzor and the Irkutsk Oblast governor, say there are 0 confirmed plague cases and 0 suspected plague cases. Media reports, unverified, describe up to 2 deaths and around 189 to 200 people under observation or hospital restrictions, with the exact meaning of those figures disputed. Some reports say WHO has asked Russia to clarify a possible second pneumonia case linked to the institute. Officials are reported to be using isolation or quarantine measures, contact follow-up, and observation or hospitalization around the institute and associated hospital setting.

Who is affected and how it spreads

Plague is a bacterial disease caused by Yersinia pestis and is usually associated with small mammals and their fleas. People can be infected by flea bites, direct contact with infected animals or materials, or by inhalation; in pneumonic plague, person-to-person spread can happen through respiratory droplets. The incubation period is usually 1 to 7 days overall, and WHO notes pneumonic plague can incubate in as little as 24 hours. WHO says untreated pneumonic plague is always fatal, and retrieved medical literature says early antibiotic treatment and post-exposure prophylaxis are important.

What we are watching

Updates

Sources