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WOS: 000388677600001 ; PubMed ID: 27667586 ; In countries from which Crimean-Congo haemorrhagic fever (CCHF) is absent, the causative virus, CCHF virus (CCHFV), is classified as a hazard group 4 agent and handled in containment level (CL)-4. In contrast, most endemic countries out of necessity have had to perform diagnostic tests under biosafety level (BSL)-2 or -3 conditions. In particular, Turkey and several of the Balkan countries have safely processed more than 100 000 samples over many years in BSL-2 laboratories. It is therefore advocated that biosafety requirements for CCHF diagnostic procedures should be revised, to allow the tests required to be performed under enhanced BSL-2 conditions with appropriate biosafety laboratory equipment and personal protective equipment used according to standardized protocols in the countries affected. Downgrading of CCHFV research work from CL-4, BSL-4 to CL-3, BSL-3 should also be considered. ; European Commission under Health Cooperation Work Program of 7th Framework Program [260427] ; Funding was received through CCH Fever Network (Collaborative Project) supported by the European Commission under the Health Cooperation Work Program of the 7th Framework Program (grant agreement no. 260427) (http://www.cch-fever.eu/). The views expressed by state-employed American co-authors are their personal views, and do not necessarily represent the views of the US government agencies they work for. The views expressed by the ECDC coauthor are his personal views, and do not necessarily represent the views of the European agency he is working for.