“…According to their medical histories, the diagnosis was verified after the autopsy. in 1954, two forestry workers became sick and died in the province of Blagoevgrad (southern Bulgaria), and the disease was definitively diagnosed retrospectively in 1960 (24). in 1956, during a national congress dedicated to the increased numbers of crimean-congo hemorrhagic fever cases in Bulgaria, Docev and colleagues reported for the first time two patients who recovered from hemorrhagic nephronephritis (11,20 Kamarinchev et al (10), who were carrying out studies on sera from livestock, wild animals, and people in 331 villages in the country (Fig.…”