This handout provided by the World Health Organization (WHO) shows WHO Director-General Tedros Adhanom Ghebreyesus (L) presenting a t-shirt to International Olympic Committee (IOC) President Thomas Bach prior to signing a cooperation agreement on promoting healthy society through sport and on contributing to the prevention of non-communicable diseases on May 16, 2020 at the WHO headquarters in Geneva. Olympic chief Thomas Bach called for vigilance and patience in preparations for the Tokyo Summer Games, postponed a year until 2021 because of the coronavirus pandemic. - RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / World Health Organization / Christopher Black" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS


 / AFP / World Health Organization / Christopher Black / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / World Health Organization / Christopher Black" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS
World Health Organisation Director General Dr Tedros Adhanom Ghebreyesus, left, and International Olympic Committee President Thomas Bach. AFP

Olympic chief calls for 'vigilance and patience' ahead of Tokyo Games