This is how I have described the Poznan non-issue for readers of ESPN FC:
Hundreds of hospital wards, we are told, have been closed by the spread of Norovirus.
But another nasty bug – the Poznan virus – is doing the rounds and has affected worrying numbers of Manchester United supporters who have gone down with distressing symptoms ranging from gross over-reaction and humourlessness to an irrational desire for vengeance.
Fortunately for those whose responsibility it is to cope with this outbreak, the cause has already been identified: lingering United anger at the Poznan-style mockery indulged in by some supporters of Sunderland, to the amusement of many more (and neutrals), at the end of the final game of last season at the Stadium of Light.