The head of Japan Medical Association (JMA) had earlier said that hosting the event in the summer of 2021 remains difficult till the time an "effective vaccine' is developed.
"Unless an effective vaccine is developed I think it will be difficult to hold the Olympics next year," JMA President Yoshitake Yokokura told reporters in Tokyo on Tuesday. "I'm not saying at this point that they shouldn't be held. The outbreak is not only confined to Japan ... it's a worldwide issue."
( With inputs from IANS )