The World Health Organization said the fast-spreading coronavirus that’s infected more than 8,200 across the world is a global health emergency — a rare designation that helps the international agency mobilize financial and political support to contain the outbreak.
The announcement comes just hours after the U.S. confirmed its first human-to-human transmission of the virus, which has killed at least 171 people in China and has now spread to at least 18 other countries.
Since emerging less than a month ago in Wuhan, China, the coronavirus has infected more people than the 2003 SARS epidemic, which sickened roughly 8,100 people across the globe over nine months. As of Thursday, there are at least eight cases in four countries, outside of China, of human-to-human transmission of the new coronavirus.
“Over the past few weeks we have witnessed the emergence of a previously unknown pathogen that has [resulted in] an unprecedented outbreak,” WHO Director-General Tedros Adhanom Ghebreyesus said during a press conference at the organization’s Geneva headquarters on Thursday. “We must act together now to limit the spread.”
WHO defines a global health emergency, also known as a “public health emergency of international concern,” as an “extraordinary event” that is “serious, unusual or unexpected.”
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The “continued increase in cases and the evidence of human-to-human transmission outside of China are, of course, most deeply disturbing,” Tedros said in a separate press conference on Wednesday. “Although the numbers outside China are still relatively small, they hold the potential for a much larger outbreak.”
The illness produces a range of symptoms, with about 20% of the patients developing severe illnesses, including pneumonia and respiratory failure, he said.
WHO doesn’t enact global health emergencies lightly. The international health agency has only applied the emergency designation five times since the rules were implemented in the mid-2000s. The last time WHO declared a global health emergency was in 2019 for the Ebola outbreak in eastern Congo that killed more than 2,000 people. The agency also declared global emergencies for the 2016 Zika virus, the 2009 H1N1 swine flu and the 2014 polio and Ebola outbreaks.
One of the criteria used to determine whether the coronavirus is an international health threat is whether the disease spreads locally once it arrives in new parts of the world, “and that’s a nuanced and important distinction to make,” Dr. Mike Ryan, executive director of the WHO’s health emergencies program, told reporters on a call last week.
The other main criteria is whether it’s already interfered or will likely interfere with trade and travel, he said. The WHO committee’s goal, he said, is to contain an outbreak without needlessly disrupting economic activity just by declaring a global health crisis.
The WHO declined at two emergency meetings last week to declare the virus a global health emergency.
Tedros said Thursday that the declaration doesn’t mean the agency has a “vote of no confidence in China.” He congratulated the Chinese government for their efforts to contain the outbreak despite the potential economic impacts.
“Our greatest concern is the potential for the virus to spread to countries with weaker health systems and which are ill-prepared to deal with it,” Tedros said.
Declaring an emergency doesn’t give the WHO extra funding or power, but it allows Tedros to make recommendations, including whether countries should impose travel or trade bans. It can also mobilize public health resources and galvanize public and political action, said Lawrence Gostin, a professor and faculty director of the O’Neill Institute for National and Global Health Law at Georgetown University.
“It signals that the world must be on the alert for a major event,” he said.
Tedros said the agency doesn’t recommend trade or movement restrictions.
“There is no reason for measures that unnecessarily interfere with international travel and trade,” he said. ”This is the time for facts, not fear. This is the time for science, not rumors. This is the time for solidarity, not stigma.”
Coronaviruses are a large family of viruses that usually infect animals but can sometimes evolve and spread to humans. The new virus is similar to the flu and can cause coughing, fever, breathing difficulty and pneumonia.
—CNBC’s William Feuer contributed to this report.
This is a developing story. Please check back for updates.