China and Russia cooperate on suspected plague case in Siberia as WHO seeks details

China confirmed cooperation with Russia on a suspected pneumonic plague case in Siberia, while the US and WHO demand more information from Moscow amid growing global health concerns. Mongolia has heightened sanitary vigilance at its border with Russia. Bloomberg reported China's foreign ministry spokesperson Guo Jiakun confirmed close communication with Russia on infectious disease control. Reports of a second institute employee with undetermined pneumonia prompted WHO's request for clarification, though Russia disputes these claims and accuses media of spreading misinformation. The case involves Daria Shipilova, a 28-year-old Irkutsk anti-plague institute worker who died Friday from undetermined pneumonia. Russia maintains the situation is controlled, with no plague detected among contacts, while US President Trump said he doesn't believe it's a Russian biological weapon.