Japan Medical Assn: Tokyo Olympics difficult without vaccine

FILE - In this Tuesday, March 24, 2020 file photo, a man is seen through the Olympic rings in front of the New National Stadium in Tokyo. The Tokyo Olympics were postponed a month ago. But there are still more questions than answers about the new opening on July 23, 2021 and what form those games will take.(AP Photo/Jae C. Hong, File)

A man with a face mask against the spread of the new coronavirus walks in front of Miraitowa and Someity, mascots for the Tokyo 2020 Olympics and Paralympics at a park in Tokyo Tuesday, April 28, 2020. Japan's Prime Minister Shinzo Abe expanded a state of emergency to all of Japan from just Tokyo and other urban areas as the virus continues to spread. (AP Photo/Eugene Hoshiko)

FILE - In this March 24, 2020, file photo, the Olympic Flame burns during a ceremony in Fukushima City, Japan. The Tokyo Olympics were postponed a month ago. But there are still more questions than answers about the new opening on July 23, 2021 and what form those games will take.(AP Photo/Jae C. Hong, File)