WHO says 'test, test, test' for coronavirus

"We have a simple message to all countries - test, test, test," WHO Director General Tedros Adhanom Ghebreyesus told a press conference in Geneva.

Without testing, cases could not be isolated and the chain of infection would not be broken, he added.

He also said even countries with good health capacity have struggled to cope, and is ''deeply concerned'' about the spread to low income countries.