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B
VZT
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C
Varicella
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D
All
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Solution
The correct option is D Varicella The varicella vaccine is recommended in many countries. Some countries require the varicella vaccination or an exemption before entering elementary school. A second dose is recommended five years after the initial immunization. A vaccinated person is likely to have a milder case of chickenpox if they become infected. Immunization within three days of exposure may improve outcomes in children.