True about varicella vaccine is ?

Ans. is 'c' i.e., Avoid salicylates for 4-6 weeks A live attenuated varicella virus vaccine is safe and currently recommended between 12-18 months of age who have not had chicken pox.The vaccine is very immunogenic, sero-conversion occurs in 95% of children after a single dose.A duration of immunity is not known, but is probably 10 years.