European PRRSpective 2023 session 2 Controlling farm breakdowns
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This study evaluates the long-term efficacy of a 20-year-old PRRS modified live vaccine (Ingelvac® PRRS MLV) in South Korea. Researchers tested it against two recent and genetically different type 2 PRRS virus isolates.
Regardless of the challenge virus, vaccination of pigs effectively reduced the level of viremia, the lung lesions, and of the PRRSV antigen within the lung lesions.