The virus is usually spread by midge bites and can affect cows, sheep and goats.
A Temporary Control Zone put in place after the bluetongue virus was found on a cattle farm in Norfolk has been lifted.Christine Middlemiss, chief veterinary officer, said: "I urge farmers to remain vigilant and report any suspicions to the Animal and Plant Health Agency ."
A month later, two cases were confirmed in Norfolk, causing a control zone for moving livestock to be put into force.Ms Middlemiss added: "We are now in a seasonally low vector period, when midge activity is much lower and there is reduced risk of disease, meaning we can lift the temporary control zones.
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