KATE CHAPPELL WORLD-RECORD sprinter and eight-time Olympic gold medalist Usain Bolt has tested positive for the coronavirus and is self-isolating at his home in Jamaica after last week celebrating his 34th birthday with a big bash mask-free. Jamaica's health ministry has confirmed that Bolt, who holds world records in the 100m and 200m distance, had tested positive after he posted a video on social media around midday saying he was waiting to hear back on his results. "Just to be safe I quarantined myself and just taking it easy," Bolt said in the message that he appeared to have taped…