Vaccines Backfire: Veterinary Vaccines Found to Combine Into New Infectious Viruses ScienceDaily (July 12, 2012) — Research from the University of Melbourne has shown that two different vaccine viruses- used simultaneously to control the same condition in chickens- have combined to produce new infectious viruses, prompting early response from Australia's veterinary medicines regulator.

Vaccines Backfire: Veterinary Vaccines Found to Combine Into New Infectious Viruses

ScienceDaily (July 12, 2012) — Research from the University of Melbourne has shown that two different vaccine viruses- used simultaneously to control the same condition in chickens- have combined to produce new infectious viruses, prompting early response from Australia's veterinary medicines regulator.