(Reuters) - European shares fell on Thursday following a strong run this week after the latest business activity data revealed the damaging impact of the coronavirus crisis.The pan-European STOXX 600 fell 1.0%, retreating from its strongest close in three weeks, led by declines in travel and leisure , banks and technology stocks.Data released earlier showed the pandemic's devastating effect on the euro zone economy abated a little in May as lockdowns imposed to contain the spread of the virus..