Why are vaccinations necessary early in life?

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Vaccinations are necessary early in life to limit the spread of disease among the young. Vaccinations have helped eliminate or nearly eliminate several diseases that used to cause significant morbidity and mortality. It is best to vaccinate early to limit the spread of disease among the young. 
Vaccinating babies and young children according to the recommended immunization schedule of the Centers of Disease Control and Prevention (CDC) gives them the best protection against 14 serious childhood illnesses -- like measles and whooping cough -- before they are two years old. The recommended vaccination schedule is designed to protect infants and children early in life, as this is the time when they are most vulnerable. Vaccination is important before they are exposed to potentially life-threatening diseases.

The presence of the CDC logo and CDC content on this page should not be construed to imply endorsement by the US Government of any commercial products or services, or to replace the advice of a medical professional. The mark “CDC” is licensed under authority of the PHS.

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Vaccines & Immunizations

Vaccines & Immunizations

Vaccines are commonly given to children in the form of a shot to help prevent serious diseases like measles and mumps. Vaccines are developed using either dead strains of a disease, weakened strains, or strains of a different dise...

ase. As adults, we receive flu vaccines or may need a booster of childhood vaccines to retain immunity. Travelers may receive vaccines either as a condition of entry to a country, or on recommendation of health officials. Generally there is little or no reaction to a vaccine, but in some cases the vaccine may cause an allergic reaction or a temporary, mild illness. Some vaccines are not safe for pregnant women, so it’s important to check with a healthcare professional.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.