good points on this boardpros annd cons , regarding whether governments should make it law or no goverment intervention. here's a scenario. pro- govt intervention, beef rendering plants cant mix e-coli infected cattle with non infected cattle as this would contaminate the whole lot. cons- non vaccinated cattle will sell at a lesser price, but then again vaccinated cattle rendering plants might gain market share , of course , passing the costs to the consumer. to sum it up, its more likely it will be law.