An operational definition is a clear, concise, detailed definition of a measure. You need operational definitions when collecting all types of data. It is particularly important when a decision is being made about whether something is defective or not defective or whether a defect exists or not.
The varicella vaccine protects against chickenpox (varicella), a common and very contagious childhood viral illness. The varicella vaccine is given by injection when kids are between 12 and 15 months old. They receive a booster shot for further protection at 4 to 6 years of age. Kids who are older than 6 but younger than 13 who have not had chickenpox also may receive the vaccine, with the two doses given at least 3 months apart. Kids 13 years or older who have not had either chickenpox or the vaccine need two vaccine doses at least 1 month apart.
MMR vaccine may be given at the same time as other vaccines. Children between 1 and 12 years of age can get a combination vaccine called MMRV, which contains both MMR and varicella (chickenpox) vaccines.There is a separate Vaccine Information Statement for MMRV.Top of Page.MR vaccine may be given at the same time as other vaccines. Children between 1 and 12 years of age can get a combination vaccine called MMRV, which contains both MMR and varicella (chickenpox) vaccines. There is a separate Vaccine Information Statement for MMRV. Top of Page.