Fig. 1.

An approach based on One Health to understand CCHF burden in Europe. The circulation of CCHFV is confirmed in countries of lower levels (1 and 2), but further investigation and increased surveillance are recommended for countries of higher levels (3, 4, and 5). CCHFV distribution within a country is unlikely to be accurately reflected by its boundaries. However, given that CCHFV activity is a priority, even a single area of focus within a country requires the involvement of the entire nation (Country boundaries are not guaranteed to represent the geographical area at risk and they are not necessarily endorsed by the authors.). CCHF, Crimean-Congo hemorrhagic fever; CCHFV, Crimean-Congo hemorrhagic fever virus.