Here is a concise original summary based on the information published by the source. What is pneumonic plague and how does it spread? BBCChecklists, masks and mystery: What we know about the plague scare in Russia CNNTrump to speak to Putin on plague as US steps up pressure Inquirer.netWhat is the plague in Russia and should the PH be worried? ABS-CBNSiberian Anti-Plague Institute Staff Isolated After Worker's Death Radio Free Europe/Radio Liberty For the full context and any later updates, use the original source link.