A total of 43 measles infections have been recorded across three regions in Bulgaria , according to data released by the Ministry of Health on March 30. The largest cluster is concentrated in the municipality of Byala Slatina, where 37 cases have been identified. Additional infections have been reported in Pleven municipality (two cases), as well as single cases in Kozloduy, Lukovit, Yablanitsa and Lovech. Laboratory testing has so far confirmed 21 of the reported infections , while results for