TOKYO: Two pole vaulters were ruled out of the Tokyo Olympics and Australia’s track and field team were briefly forced into isolation on Thursday in a jolting reminder of the risks facing athletes at the coronavirus-hit Games.On the eve of the athletics competition, 2016 bronze medallist Sam Kendricks and Argentina’s German Chiaraviglio suffered heartbreaking disappointment when they both tested positive.Kendricks’ case triggered a panic in the Australian team, which went into...