Vaccines are made of weakened or dead disease-causing germs. When they are put into the body, they make the immune system produce antibodies. This makes the body able to recognise and attack the infection in the future. Students can refer to the Class 12 Biology Chapter 7 question answer, for more detailed explanation.
Question : What level of prevention is targeted by water defluoridation?
Option 1: Tertiary prevention
Option 2: Primordial prevention
Option 3: Primary prevention
Option 4: Secondary prevention
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