Wiessing, L, Kalamara, E, Stone, J, Altan, P, Van Baelen, L, Fotiou, A, Garcia, D, Goulao, J, Guarita, B, Hope, V, Jauffret-Roustide, M, Jurgelaitienė, L, Kåberg, M, Kamarulzaman, A, Lemsalu, L, Kivite-Urtane, A, Kolarić, B, Montanari, L, Rosińska, M, Sava, L et al, Horváth, I, Seyler, T, Sypsa, V, Tarján, A, Yiasemi, I, Zimmermann, R, Ferri, M, Dolan, K, Uusküla, A and Vickerman, P (2021) Univariable associations between a history of incarceration and HIV and HCV prevalence among people who inject drugs across 17 countries in Europe 2006 to 2020 – is the precautionary principle applicable? Eurosurveillance, 26 (49). ISSN 1560-7917