The coronavirus outbreak can still be beaten, the World Health Organization said on Monday, insisting it was premature to declare it a pandemic even though it had the potential to reach that level.

"The key message that should give all countries hope, courage and confidence is that this virus can be contained, indeed there are many countries that have done exactly that," WHO Director-General Tedros Adhanom Ghebreyesus told a news conference in Geneva.

"Using the word 'pandemic' now does not fit the facts but may certainly cause fear," he added as the number of cases continued to mount internationally and financial markets spun lower.