The contaminant has been linked to the deaths of more than 300 children in Africa and Asia
Tedros told the Munich Security Conference in Germany he was encouraged by actions China had taken to slow the spread of virus but was still concerned about the increasing number of cases.
French officials said on Saturday an elderly Chinese tourist infected with the coronavirus had died in France, becoming the first fatality in Europe and the fourth outside mainland China from an epidemic that has rattled the world.