https://vaccineingredients.net/ingredients/vero-cells-dna-from-porcine-circoviruses-pcv-1-and-2-has-been-detected-in-rotateq-pcv-1-and-pcv-2-are-not-known-to-cause-disease-in-humans
vero cells [DNA from porcine circoviruses (PCV) 1 and 2 has been detected in RotaTeq. PCV-1 and PCV-2 are not known to cause disease in humans.]