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WHO Warns Of Zika Virus's 'Alarming' And 'Explosive' Spread

Dr. Margaret Chan is director-general of the World Health Organization. In her first major address on Zika, delivered Thursday in Geneva, she said: "Questions abound. We need to get some answers quickly." (/epa/Corbis)
Dr. Margaret Chan is director-general of the World Health Organization. In her first major address on Zika, delivered Thursday in Geneva, she said: "Questions abound. We need to get some answers quickly." (/epa/Corbis)

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