Word: prv
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Dates: during 1986-1986
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Last week Main and other farmers were perplexed when the U.S. Department of Agriculture, under attack by critics, halted the sale of Omnivac-PRV, a new genetically engineered viral vaccine that immunizes swine against pseudorabies and may be the first of a whole generation of better animal vaccines. Main had participated in a field test of the vaccine last year by allowing 250 of his piglets to be inoculated. None of them or of others involved in the test contracted the disease, and in January the USDA licensed Biologics Corp., a vaccine manufacturer in Omaha, to put Omnivac...