Ten more people involved in the Summer Olympics in Japan, including an athlete, have tested Covid-19 positive, the organising committee said Wednesday. Among those who contracted the virus are a foreign athlete, one foreign staff member and eight other people involved in the Olympics. Read: Olympics, pandemic and politics: There's no separating them The new infections have brought the Games-linked Covid-19 cases in Japan to 81 since July 1, while more international athletes are testing positive at home and unable to travel. The virus has also been detected in four athletes and accompanying personnel from training camps located outside Tokyo, the organisers added. Health experts in Japan have warned of the Olympics becoming a "super-spreader" event bringing tens of thousands of athletes, officials and workers during a local state of emergency. However, World Health Organization Director-General Tedros Adhanom Ghebreyesus said Wednesday, "The Tokyo Olympics should not be judged by the tally of Covid cases that arise because eliminating risk is impossible."  Read: WHO head says Olympics virus risk inevitable "The mark of success is making sure that any cases are identified, isolated, traced and cared for as quickly as possible and onward transmission is interrupted," Tedros said in a speech to an International Olympic Committee meeting.