Professor David Walker, Deputy Chief Medical Officer, told Daybreak that the launch of the mass immunisation scheme was purely coincidence that it came at the same time as the MMR scare.
He said: "The timing is simply this is the time it's taken to develop the vaccine and to develop it's implementation."
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The families of all four of the victims, all of whom were men, have been informed, police said.
A motorcyclist from Nottingham has died in an accident at the Macau Grand Prix in China, earlier today.
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