Bulgaria is not currently facing a measles outbreak, but declining vaccination coverage is raising concerns about a potential epidemic, Acting Health Minister Assoc. Prof. Mihail Okoliyski said in an interview with BNT. A total of 101 cases have already been confirmed across five regions, while immunization rates among 12-year-olds have dropped to below 82%. “ There are also fictitious vaccinations, but what is more worrying is that vaccination coverage among 12-year-olds has fallen below 82%.