The World Health Organization (WHO) has declared the most recent Ebola outbreak 'a public health emergency of international concern.' Infectious disease specialist Monica Gandhi explains what that means,

WHO chief Tedros Adhanom Ghebreyesus says risks from the Ebola outbreak in Congo and Uganda are "high at the national and regional levels, and low at the global level."

The rare Bundibugyo strain, with no approved vaccine or treatment, has killed nearly 90 people and reached Congo's capital, Kampala, and beyond.

The agency said insecurity, population movement and operational constraints were complicating surveillance and contact tracing efforts, particularly in eastern DRC, where most cases have been reported.

The international health agency notes that the outbreak does not meet the criteria for a pandemic, and the U.S. Centers for Disease Control and Prevention says that the risk to the American public is

The World Health Organization declared a public health emergency of international concern over an outbreak of a rare Ebola virus in central Africa. On May 17, WHO Director-General Tedros Adhanom Ghebreyesus announced the outbreak of the Bundibugyo virus,

The Ebola outbreak first reported in the Democratic Republic of the Congo on Friday has seemingly escalated quickly into a large, uncontrolled multinational outbreak. As of May 17, there were 10 confirmed cases,

In its latest update, the World Health Organization says there have now been 139 suspected deaths and 600 cases.

The World Health Organization said in a statement that the outbreak, however, does not meet the criteria of a pandemic emergency.