What are the odds that a fan attending the upcoming Tokyo Games will be found to have been infected with the novel coronavirus?

They could be as low as one in a million, if data from Japan¡¯s top professional sports leagues is any indication ¡ª offering hope to Olympic organizers faced with the monumental task of delivering the world¡¯s biggest sporting event in the pandemic era.

With officials on Saturday announcing a ban on overseas attendees ¡ª a first in the event¡¯s history ¡ª and local media reports suggesting that venues could be restricted to 50% capacity to allow for physical distancing, attention will now turn to whether local fans allowed to attend the Olympics will be at risk of infection.