Panayotova, E., Christova, I., Trifonova, I., Taseva, E., Gladnishka, T. and Ivanova, V. (2019) “SEROPREVALENCE OF WEST NILE VIRUS IN BULGARIA, 2018”, PROBLEMS of Infectious and Parasitic Diseases, 47(2), pp. 15-17. Available at: https://pipd.ncipd.org/index.php/pipd/article/view/47_2-4_SEROPREVALENCE_OF_WEST_NILE_VIRUS_IN_BULGARIA_2018 (Accessed: 25May2020).