Analysis of the application of live attenuated PRRS vaccines

Please share what you know about the application of live attenuated PRRS vaccines
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Following this together with you~~~
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I suggest not using it. Based on my nearly 10 years of experience working on pig farms, outbreaks occur whether you use it or not. So don't use it.
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Does it have no effect when used? They say Shanghai Hile's is good. We have high fever disease here, and they say pigs injected with Shanghai Hile's vaccine are all fine. I don't know whether that's true or false, or whether the manufacturer is just advertising.
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Shanghai Hile's is indeed good.
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There are a great many PRRS strains. Controlling the disease through vaccination may still be unrealistic! Could it be that after injecting the live attenuated vaccine, it helps reduce symptoms and losses from infection with new strains?
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I agree with the opinion above, but I have never used it.
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Reply to 4#daliudian


We also use Hile's, but there are still cases of high fever disease.
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Are the symptoms milder? Are the losses smaller?
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Shanghai Hile's is pretty good! And there's also Boehringer!
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Hile's effect is good, it's just a bit expensive.
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Hile's - inject it and the disease breaks out.