Vaccination helps to protect babies and children against serious childhood infections. Routine childhood Vaccinations protect against diphtheria, tetanus, whooping cough (pertussis), polio, pneumococcal disease, meningococcal C disease, hepatitis B, Haemophilus influenzae type b (Hib), rotavirus, chickenpox (varicella), measles, mumps and rubella (German measles). Serious side effects or allergic reactions to the vaccines are rare.
Immunization (vaccination) is a way of creating immunity to certain diseases by using small amounts of a killed or weakened microorganism that causes the particular disease.
Microorganisms can be viruses (such as the measles virus) or they can be bacteria (such as pneumococcus). Vaccines stimulate the immune system to react as if there were a real infection — it fends off the "infection" and remembers the organism so that it can fight it quickly should it enter the body later.
There are a few different types of vaccines. They include :
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