See:
Stop Using Modified Live Vaccines On Breeding Cattle
Also see: http://www.cattlenetwork.com/cattle-res ... 25431.html
Stop Using Modified Live Vaccines On Breeding Cattle
http://farmprogress.com/story-stop-usin ... le-0-64594Evidence is mounting that modified-live IBR vaccines are causing abortions and unsettled cows.
In 2004 the FDA approved the labeling of MLV IBR vaccines for use in pregnant cows after the cow had been vaccinated with the same MLV prior to breeding. This two-part labeling instruction is very specific and was intended to protect the cow from abortion. However, researchers are now finding a first MLV vaccination given to open cows does not prevent the second MLV vaccine from causing abortions.
Also see: http://www.cattlenetwork.com/cattle-res ... 25431.html