The Interviewer (1987)

Original title: Человек, который брал интервью

While working in Afghanistan, Soviet journalist Aleksei Rusanov witnesses the spread of a strange disease. He manages to find out that the carriers of the dangerous virus are mosquitoes of a previously unknown species. Aleksei goes to Sindabad and penetrates the secret laboratory of Professor Neli, whose work on the elimination of deadly insects is funded by the CIA...