UNICEF and WHO reports reveal that despite widespread vaccine hesitancy threatening child health across Europe and Central Asia, Bulgaria is showing promising improvements in childhood immunization rates. According to 2024 data, Bulgaria ranks among the top countries in the region for vaccination coverage. The six-component vaccine, which protects against diphtheria, tetanus, pertussis, hepatitis B, Haemophilus influenzae type B, and poliomyelitis, recorded first, second, and third dose