Varicella vaccine were vaccinated as children were still protected from varicella." However, since only one out of five Japanese children were vaccinated, the annual exposure of these vaccinees to children with natural chickenpox boosted the vaccinees' immune system. In the United States, where universal varicella vaccination has been practiced, the majority of children no longer receive exogenous (outside) boosting, thus, their cell-mediated immunity to VZV (varicella zoster virus) wanes—necessitating booster chickenpox vaccinations. As time goes on, boosters may be necessary. Persons exposed to the virus after vaccine tend to experience milder cases of chickenpox. Catching "wild" chickenpox as a child has been
Technical school courses (such as speech or composition) to complete in order to receive the more traditional two-year technical school diploma referenced above. Technical school In the United States, a technical school is a two-year college that covers fields such as business, finance, hospitality, tourism, construction, engineering, visual arts, information technology and community work. The Association for Career and Technical Education is the largest U.S. education association dedicated to promoting career and technical education for youth and adults. Technical school is also the term used in the United States Armed Forces for the job specific training given immediately after recruit training. Though