Vaccines backfire: Veterinary vaccines found to combine into new infectious viruses

Thursday, July 12, 2012 - 17:00 in Health & Medicine

Two different vaccine viruses -- used simultaneously to control the same condition in chickens -- have combined to produce new infectious viruses. The research found that when two different ILT vaccine strains were used in the same populations, they combined into two new strains (a process known as recombination), resulting in disease outbreaks.

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