45 The Vaccine Which Was Linked to Bleeding Calf Syndrome – 3 years after Pfizer introduced its Pregsure vaccine for cattle, the horrific disease affecting calves and usually fatal, began to appear. "Alloantibodies" were transmitted via mother's colostrum to the calves (www.rayarmat.com) posted 3 years ago by clemaneuverers 3 years ago by clemaneuverers +45 / -0 6 comments share 6 comments share save hide report block hide replies
Here's an article that actually explains the situation:
https://www.producer.com/livestock/bleeding-calf-syndrome-linked-to-diarrhea-vaccine/