(a) It is generally observed that the children who had suffered from chicken – pox in their childhood may not contr

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Q 2654078854.    
(a) It is generally observed that the children who had suffered from chicken – pox in
their childhood may not contract the same disease in their adulthood. Explain
giving reasons the basics of such immunity in an individual. Name this kind of
immunity.
(b) What are interferons? Mention their role.
CBSE-12th 2016

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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