| imported wild poliovirus causing poliomyelitis--bulgaria, 2001. | in march 2001, a 13-month-old unvaccinated roma (i.e., gypsy) girl from bourgas, bulgaria, had onset of bilateral leg weakness. the national enterovirus laboratory in the capital city of sofia subsequently isolated a wild type 1 poliovirus in the patient's stool. in april, a second case, with wild type 1 poliovirus isolate was found in lambol located approximately 50 mileswest of bourgas in an unvaccinated 26-month-old roma girl who had onset of paralysis of both legs. subsequent analyses indica ... | 2001 | 11902348 |