"If everybody is planning for the Games, we must plan for the Games as well, because that's our obligation to the athletes".
She requested the International Olympic Committee keep NOCs well informed about milestones leading up to a final decision.
International Olympic Committee president Thomas Bach said they heard athletes' concerns on health and preparation but Coe said ensuring a level playing field for athletes during preparations may not be possible but it is a challenge World Athletics will strive to overcome.
'No solution will be ideal in this situation and this is why we are counting on the responsibility and solidarity of the athletes'.
Former US Olympic distance runner Kara Goucher joined the chorus of those who have called for a postponement, accusing Olympic chiefs of placing financial considerations above athlete safety.
"We are living through an unpredictable crisis and as such, it is important that we have one policy, expressed by the International Olympic Committee, and we follow that policy in unison". "IOC is encouraging us to continue training. and how?"
The IOC is s to set up a task force to make necessary and practical adaptations to qualifying procedure and period for the remaining 43 per cent of places.
An IOC member called the body's stance "insensitive and irresponsible", saying athletes were facing "anxiety and heartbreak" as they try to train during the virus emergency.
"We have studied different scenarios facing the global impact" of the disease, Bach said in an interview with The New York Times, in which he was opposed to cancel the event.
Mori has not been tested for the virus because he was not subject to testing requirements, an official from Mori's office said, adding that he had no symptoms of the virus.
Numerous professional boxing events throughout the world have been postponed until at least the end of April. Runners and staff will have their temperature and health monitored, the organizers said.
Australian media company Seven West would be reimbursed the cost of its Tokyo 2020 broadcasting rights deal should this summer's Olympics be cancelled due to the coronavirus pandemic, according to a report by the Brisbane Times.