Fetal Bovine Serum in Vaccines

Are you worried about fetal bovine serum in vaccines?

Are you wondering why they put fetal bovine serum in vaccines?

Well, it is not really added to the vaccine, like a preservative.

Instead, the CDC explains why fetal bovine serum may be in some vaccines:

In the manufacture of viral vaccines, the virus may be grown in cells.  These cells need a source of nutrition, which in some instances may be provided by fetal bovine serum.

So fetal bovine serum is used as a growth media. And it is eventually removed.

There is no risk that using these materials from cows could cause mad-cow disease.

For more information:

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