On Sunday, the director-general of the World Health Organization, Tedros Adhanom Ghebreyesus, urged all countries to “step up efforts to prepare” for the international spread of coronavirus and encouraged leaders to share information about the outbreak in “real time” with the U.N.’s agency for public health. While pushing for donors to hit the fundraising goal of $675 million, Adhanom, Ethiopia’s former minister of health, provided a disconcerting perspective: Though he reiterated his “call for calm,” he also stated that the current level of the virus’s outbreak “may only be … the tip of the iceberg.”