The World Health Organization counts 58 cases and 27 deaths in the Democratic Republic of Congo's outbreak of Ebola, which is transmitted from wild animals to people and spreads human-to-human via the bodily fluids of infected people. WHO officials said they are worried about a fast spread of the deadly disease to other population centers. (ASSOCIATED PRESS)
Dr. Tedros Adhanom Ghebreyesus, director general, WHO (center), listens to the head doctor of Al-Sabeen Hospital in Sanaa, Yemen. (Courtesy WHO) ** FILE **
FILE - A Wednesday, May 24, 2017 file photo showing Tedros Adhanom Ghebreyesus, director general of the World Health Organization (WHO), answering questions from journalists at the European headquarters of the United Nations in Geneva, Switzerland. The new head of the World Health Organization said he is reviewing the agency's travel expenses, after an Associated Press story last month revealed the U.N. agency spends more on travel than on fighting AIDS, malaria and tuberculosis combined. (Martial Trezzini/Keystone via AP, File)
FILE - In this Monday July 25, 2016 file photo, World Health Organization Director General Margaret Chan, left, listens as Chinese President Xi Jinping, right, speaks during a meeting at the Great Hall of the People in Beijing. After leading the World Health Organization for the last decade, Dr. Margaret Chan knows all too well how politics infuses actions at nearly every level of the U.N. agency. As WHO member countries prepare to elect her successor on Tuesday, May 23, 2017 the Associated Press reveals eyebrow-raising details from internal documents that show how she appeased dictators in Turkmenistan and North Korea _ and told then-Prime Minister Vladimir Putin she'd see to how WHO might hire more Russians. (AP Photo/Mark Schiefelbein, File)
FILE- In this Thursday, April 28, 2011 file photo, Russian Prime Minister Vladimir Putin right, jokes with WHO Director General Dr Margaret Chan during the World Health Organization meeting on healthy lifestyle in Moscow. After leading the World Health Organization for the last decade, Dr. Margaret Chan knows all too well how politics infuses actions at nearly every level of the U.N. agency. As WHO member countries prepare to elect her successor on Tuesday, May 23, 2017 the Associated Press reveals eyebrow-raising details from internal documents that show how she appeased dictators in Turkmenistan and North Korea - and told then-Prime Minister Vladimir Putin she'd see to how WHO might hire more Russians.(AP Photo/Mikhail Metzel, File )
FILE - In this Wednesday, June 11, 2014 file photo, WHO's Margaret Chan meets with Turkmenistan's President Gurbanguli Berdymukhamedov in Ashgabat, Turkmenistan. After leading the World Health Organization for the last decade, Dr. Margaret Chan knows all too well how politics infuses actions at nearly every level of the U.N. agency. As WHO member countries prepare to elect her successor on Tuesday, May 23, 2017, the Associated Press reveals eyebrow-raising details from internal documents that show how she appeased dictators in Turkmenistan and North Korea - and told then-Prime Minister Vladimir Putin she'd see to how WHO might hire more Russians. (AP Photo, file)
In this Tuesday, March 29, 2016, file photo, Margaret Chan, left, General Director of the World Health Organization (WHO), and Bruce Aylward, right, Executive Director of WHO and Health Emergencies Director-General's Special Representative for the Ebola Response, speak to the media after The International Health Regulations Emergency Committee on Ebola, during a press conference, at the WHO headquarters in Geneva, Switzerland. The World Health Organization routinely spends about $200 million a year on travel, far more than what it doles out to fight some of the biggest problems in public health including AIDS, tuberculosis and malaria, according to internal documents obtained by The Associated Press, published Sunday, May 21, 2017. (Salvatore Di Nolfi/Keystone via AP, File)
In this Jan. 26, 2017, file photo David Nabarro, U.N. secretary-general's special envoy on ebola, speaks to the media, at the World Health Organization (WHO) headquarters in Geneva, Switzerland. (Martial Trezzini/Keystone via AP) ** FILE **
FILE - In this Jan. 26, 2017 file photo, Pakistani doctor Sania Nishtar, attends a press conference at the World Health Organization (WHO) headquarters in Geneva, Switzerland. For the first time, WHO’s governing body made up of 194 member states will choose from three candidates, Tuesday May 23, 2017. not one pre-selected by its executive board, as in past years. David Nabarro a British physician, Tedros Adhanom Ghebreyesus a former Ethiopian health minister and Pakistani doctor Sania Nishtar are the candidates to replace WHO Director General Dr. Margaret Chan. (Martial Trezzini/Keystone via AP)
FILE - In this Jan. 26, 2017 file photo, Tedros Adhanom Ghebreyesus, Ethiopian former Minister of Health, speaks at the World Health Organization (WHO) headquarters in Geneva, Switzerland. For the first time, WHO’s governing body made up of 194 member states will choose from three candidates, Tuesday May 23, 2017. not one pre-selected by its executive board, as in past years. David Nabarro a British physician, Tedros Adhanom Ghebreyesus a former Ethiopian health minister and Pakistani doctor Sania Nishtar are the candidates to replace WHO Director General Dr. Margaret Chan. (Martial Trezzini/Keystone via AP, file)
ADVANCE FOR WEEKEND EDITIONS, MAY 6-8 - In this April 28, 2017 photo, Tonya Mathews, WHO has worked as the supervisor of the north entrance to Yellowstone National Park since 2009, poses for a photo in Gardiner, Mont. (Michael Wright/Bozeman Daily Chronicle via AP)
Douglas Bettcher, Director of the Department for Prevention of Noncommunicable Diseases of World Health Organization (WHO) speaks during a media conference in Tokyo, Friday, April 7, 2017. The senior World Health Organization official says Japan should go fully smoke-free in public places if it wants success in Tokyo Olympics and tourism promotion. (AP Photo/Mari Yamaguchi)
Douglas Bettcher, Director of the Department for Prevention of Noncommunicable Diseases of World Health Organization (WHO) speaks as he shows a document during a media conference in Tokyo, Friday, April 7, 2017. The senior World Health Organization official says Japan should go fully smoke-free in public places if it wants success in Tokyo Olympics and tourism promotion. ( (AP Photo/Mari Yamaguchi)
Dr. Margaret Chan, director-general of the World Health Organization, and U.N. Secretary-General Ban Ki-moon met with vaccine manufacturers during the 62nd World Health Assembly in 2009, where they discussed medical responses to the H1N1 influenza pandemic. Image courtesy of the World Health Organization.
World Health Organization Regional Director Shin Young-soo gestures as he answers questions from reporters in Manila, Philippines Monday, Oct. 10, 2016. WHO officials say cases of the mosquito-born Zika virus infection are expected to continue to rise in Asia Pacific and regional health authorities are scaling up surveillance, preparing responses to complications and collaborating to come up with answers to many questions about the disease. (AP Photo/Aaron Favila)