In UE antibodies against Varicella zoster virus are generally acquired in first decade of life of the child. The illness is highly transmittable and in cases  between 2% and 6% it presents some complications, which normally involve skin and soft tissues, but can also be neurological or pneumological. That is why prevention of varicella is a very important tool for public care.
Professor Vitale analyzes the schedule of vaccination for varicella in the different European countries and the subsequent results; he also speaks about the 2 doses schedule, fundamental to avoid the so called varicella breakthrough's. Eventually he compares pros and cons of the two types of existing vaccine: monovalent and tetravalent.