Japan rejects London's offer to take over Tokyo 2020 Olympics amid coronavirus fears

WHO: Not sure about the Olympics

Earlier in the week, Japanese public health expert Shigeru Omi, head of the Japan Community Health Care Organization, and former regional director of the WHO, said he could not be sure about the Olympics.

"Whether the outbreak will last until the Olympic date or not depends upon the virus and the societal effort and joint international community," he said at a news conference.

"Nobody can predict whether we can contain the virus or put an end to this outbreak before the Olympics start. That's anybody's guess."