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In which way has the study of biology he...

In which way has the study of biology helped us to control infectious diseases?

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The study of biology helped us:
(a) To understand the various causes of infectious diseases.
(b) To know the mode of transmission of infectious diseases.
(c) The effect of various diseases on body systems.
(d) Discovery of antibodies, antibiotics, synthetic drugs and plant derived drugs to control such diseases.
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