the European Union-NextGenerationEU,through the National Recovery and Resilience Plan of the Republic of Bulgaria,No.BG-RRP-2.004-0008.
BACKGROUND Varicella(chickenpox)and herpes zoster(shingles)are outcomes of varicella-zoster virus(VZV)infection,and understanding their incidence trends is vital for public health planning.AIM To conduct an ambispecti...