The end of the New Zealand and Australia leg of his farewell tour in February was marred by his ill health.And now Elton John, 73, has announced he is unable to go ahead with the next leg in the United States due to the coronavirus pandemic.In an announcement via his official Twitteron Thursday, a statement on behalf of the British star explained: 'It is with deep regret that Elton John must postpone the remainder of his upcoming North American 2020 dates on his Farewell Yellow Brick Road tour from May 22 through July 8.' Postponed: Elton John, 73, has announced he is unable to go ahead with the next leg of his Farewell Yellow Brick Road tour in the United States due to the coronavirus pandemicThe statement continued: 'Previously postponed.