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 draw go a required distance and have replaced it with a no contest. Technical draw A technical draw is a term used in boxing when a fight has to be stopped because a fighter is unable to continue from an accidental injury (usually cuts) or foul. Draws occur when the bout goes to the scorecards, and the officials cannot determine a winner. If a winner is determined, the decision is referred to as a technical decision. Technical draws also occur when a bout has not completed a certain number of rounds (usually four), which makes it not an "official fight." Most