The body through various ways builds immunity or resistance against certain infections. Antibodies can be naturally passed on from the mother to fetus or immunity can be self-acquired. For example, someone previously exposed to the varicella-zooster virus (chickenpox) develops immunity at that point and would be able to resist it on the second exposure. Another way to acquire immunity is through VACCINATION. Vaccination is the introduction of vaccines (antigenic materials either live attenuated vaccines or inactivated vaccines) into the body to help stimulate the body to build antibodies that would help protect it from future infections.
Vaccines are a sure way to acquire immunity for this reason WHO recommends an immunization schedule for babies from birth up to adulthood. Vaccination should not be a thing of choice but a must for every child as this would help the child fight against most of these childhood diseases.
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