viral fluids

[mariapla]

Hi everybody:
This is about the manufacture of a vaccine that I am translating into Spanish. I am not sure about the meaning of viral fluids and I also wonder if anybody knows how to translate it into that language.

Fetal Bovine Serum is gamma-irradiated by the vendor before use in cell culture propagation. Gamma-irradiated FBS is used durinf preparation of rotavirus master seeds and **virus fluids**.

Thank you in advance

mariapla