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Person suffered from smallpox at the age of ten years and thereafter he never

had it during his lifetime. Which type of immunity the person has developed?


Acquired immunity : immunity acquired by infection.
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When he was suffering from small pox, the white blood cells were fighting those viruses. After the disease had gone the white blood cells made antibodes against the virus so that if it attacks again it would be less effective. This type of immunity is called acquired immunity i.e immunity acquired after infection

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