write very briefly about the following a)BCG ,b)incubation period c) chicken pox D) hepatitis A
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BCG vaccine has been found useful in developing immunity for tuberculosis.
Incubation period is the period between the entry of germs and the appearance of the first symptoms of the disease.
Incubation period is the period between the entry of germs and the appearance of the first symptoms of the disease.
rishu:
explain briefly
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I have given c and d ok
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