A Week Later, Russia Hasn’t Said What Pathogen Killed Plague Researcher

The cause of death of a Russian scientist who died from a mysterious pathogen remains unknown, over a week after the incident.

The scientist was working on a project to develop a vaccine against the plague.

Experts have expressed concern, stating that with modern testing technology, the Russian authorities should have identified the pathogen by now.

The incident has raised questions about Russia's handling of the situation and the safety of its scientific researchers.