Is squalene used in flu shots, and is it safe?

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Squalene is not used in the seasonal flu vaccine in the United States. Squalene is what is known as an adjuvant, a substance added to some vaccines to make them work better.

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Vaccines work to protect your body against germs. Because of vaccines, many of the diseases that can cause severe sickness, handicaps and death have been eradicated. Learn more from our experts about vaccines.

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