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What is Chicken pox vaccine is - and explain in detail?
Prevention of chickenpox

For prevention of chickenpox, following are used-

i)    Varicella zoster immunoglobulin (VZIG)

VZIG is given within 72 hours of exposure in exposed susceptible individuals.
It is given intramuscularly with a repeat dose in 3 weeks.
Because VZIG bind to the varicella vaccine, the two should not be given concomitantly.

ii) Vaccine

Varicella vaccine is a live attenuated vaccine and is recommended for children between 12-18 months of age.
Efficacy of vaccine is 90 - 95% and the duration of immunity is probably 10 years.
Two doses are recommended in person older than 12 years of age.