The International Olympic Committee says it will take an "Armageddon" to cancel the Tokyo Games.
The games' opening ceremony will be held tonight.
Among other competitors, New Zealand's men's and women's football teams have already begun competition, while our rowers will get their first go on the water later this morning.
IOC member Dick Pound told Mike Yardley stringent measures are in place to prevent the spread of Covid-19, and a cancellation of the games remains an extremely unlikely, last resort.
"We're in constant daily, if not hourly touch with the organisers and Japanese authorities and public health authorities, including the WHO."