The "unknown pneumonia" was also mentioned in this post:In life mirroring Borat, the most glorious nation of Kazakhstan says Chinese are know-nothings and there is no new deadly virus in most wonderful and healthy nation
So authorities in Kazakhstan have denied a report published by Chinese officials that the country is experiencing an outbreak of "unknown pneumonia" potentially deadlier than the novel coronavirus.
The WHO are looking into it with the Kazakh authorities. The WHO are keeping an open mind about it at this point, but they suspect that it's actually just COVID-19 and that Kazakhstan have a problem with their lab testing. Kazakhstan are currently seeing large increases in numbers of COVID-19 infections.
It's a situation to keep an eye on however, regardless of the cause.