On 23 January, in reaction to the central authorities' decision to implement a transportation ban in Wuhan, WHO representative Gauden Galea remarked that while it was "certainly not a recommendation the WHO has made", it was also "a very important indication of the commitment to contain the epidemic in the place where it is most concentrated" and called it "unprecedented in public health history".On 30 January, following confirmation of human-to-human transmission outside China and the increase in the number of cases in other countries, the WHO declared the outbreak a Public Health Emergency of International Concern (PHEIC), the sixth PHEIC since the measure was first invoked during the 2009 swine flu pandemic.