For which of the following diseases, the presence of antibodies in the bloodstream are permanent?
A
Common cold
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B
Cancer
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C
Small box
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D
None of the above
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Solution
The correct option is C Small box Some antibodies produced in the blood remain for a long period and kill the similar pathogens, whenever they enter the body. This is called active acquired immunity. The presence of antibody for smallpox is permanent in the body.