Russian Opposition Leader Alexei Navalny Arrives At Berlin Hospital

A German NGO facilitated the airlift of a 44-year-old anticorruption blogger to a hospital after a suspected poisoning. Although doctors have not confirmed poisoning, the hospital is conducting extensive tests. The blogger fell ill on a flight to Moscow, causing an emergency landing. His spokesperson claims he only drank tea before the flight. Initially treated in Russia, no poison was found, but his team claims a deadly substance was detected. The blogger, a critic of President Putin, has faced similar incidents before, as have other opposition figures.

What was the official diagnosis of the previous incident involving a volunteer?

Who is Navalny a critic of, according to the text?