Study Clearly states E.Coli SRP vaccine from Pfizer, "commercially available vaccine." It was effective because dosage delivered was several fold the one used in the earlier study. Compared it to Bovamine. How lame is that. Drs. Renter and Nataraja need to be informed on Econiche, best kept secret in the US veterinary world. But the truth will get out. FDA is mired in it's own scandles.
You can't sell or market what you do not produce, that little detail will be resolved soon enough!