Is it safe to combine several vaccines in a single shot?

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Anthony L. Komaroff, MD
Internal Medicine
There have been debates about the safety of combining several vaccines into a single shot. But there is no scientific reason not to give a child the combined  vaccines as recommended by the Centers for Disease Control and Prevention (CDC). According to a CDC report titled "General Recommendations on Immunization," the rates for a vaccine reverting to a virulent form and having any adverse reactions were the same for combined vaccines as they were for singly administered vaccines. The major benefits of simultaneous administration are fewer shots for the child and assurance that a child has received all the requisite shots at the right age.

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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.