Takeshi Nakai warns the epidemic is far from over and people should be prepared for a long-term battle.
However, Dr Nakai said countries in Asia show there are successful ways of slowing the spread of the pandemic.
He said these include finding, isolating and testing cases early.
Dr Nakai said tracing and quarantining contacts quickly as well as stopping physical interaction is also proven to help.
"But we need to be clear that even with all of these measures, the risk will not go away as long as the pandemic continues. Rather, these measures can buy us valuable time to prepare for large scale community transmission."