Can vaccines be contaminated with infectious agents that cause diseases?

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Vaccines are made under very strict standards and it is extremely rare for them to be contaminated. This is because the solution (vehicle that the vaccine is mixed with) has sterilizing ingredients. However, though it is extremely rare for a vaccine to be contaminated, it is possible.
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There is no evidence that currently available vaccines are contaminated with infectious agents that cause disease. Today, manufacturers are required to test for a variety of infectious agents to ensure that the vaccines are not contaminated.

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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.