Gennadiy N. Lepeshkin: There were several official versions. Оne of the versions was the "meat version," that is, the disease... was spread through... the disease through... meat whi-... infected meat, which was being sold. So... but no one was ever able to establish the actual reason. The investigation was quite protracted, and American specialists were brought in, and they were also involved in the work, but no specific result was ever arrived at.