Increasing Covid-19 cases in Tokyo raise the risk of transmission for those inside the Olympic bubble, a public health expert in the Japanese capital said.
Tokyo on Wednesday reported more than 3,000 new infections in a single-day record.
Public health expert Kenji Shibuya said Tokyo using its own severity scale "masks the true magnitude of the problem."
"Obviously the more transmission outside, the more opportunity for those within the bubble will get infected, and vice versa, as it has already burst," Shibuya said.
Tokyo's health system is "being overwhelmed," he added.
A Tokyo Metropolitan Government official said the capital has a total of 392 beds for "serious Covid-19 patients," of which 80 are currently occupied.
Japanese media is reporting that three prefectures neighboring Tokyo — Chiba, Kanagawa and Saitama — will ask Japan's government to be added to areas under the Covid-19 state of emergency after a recent surge, citing Chiba Gov. Toshihito Kumagai.
At least 198 Covid-19 cases have been linked to the Games so far.
Meanwhile, the International Olympic Committee said it's confident the Games and its Covid-19 cases are not affecting hospital care for the population outside of the sporting event.
IOC spokesman Richard Budgett said in a press briefing the "highest priority" is that "we do not affect the normal provision of care to the general population."