I had flu several weeks ago and at the same time, an American friend also had it and was told by her doctor about the mutant strain. I looked up the Centre for Disease Control web site which confirmed the story. If this was known at least a month ago, why has it taken so long to become public knowledge in this country? My GP told me three weeks ago that it explained the recent problems at A&E. The jab we had in the autumn contained two strains of the virus, one of which has, unpredictably, mutated. We are still protected against the other one, though that's not much consolation to me!