Injecting drug use: A vector for the introduction of new hepatitis C virus genotypes

Table 4 Hepatitis C virus genotypes prevalence in the European regions

European regions	The most prevalent genotype	Other genotypes	Comments	First author
Northern Europe	1a	1b, 2, 4	G1a frequent among PWID	Bruggmann et al[52], 2014
Western Europe	1b	3a (France)	G1b-common in older age groups	Messina et al[43], 2015
		4a (United Kingdom, The Netherlands, Germany)		Payan et al[53], 2005
Southern Europe	1b	2a, 2b, 2c, 4	G4 is becoming more frequent	Gower et al[10], 2014
				Cifuentes et al[54], 2015
Eastern Europe	1a	1b, 2, 3, 4	Non G1 genotypes reported in migrants	Cornberg et al[16], 2011
				Messina et al[43], 2015