Margaret chan
WHO advises against travel or trade bans on Ebola-hit areas
Some airlines have stopped flights to affected areas whichhas hampered aid efforts.
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'Ebola cases could hit 20,000 in 6 months'
The WHO warned the acceleration of the disease could increase number of cases to 20 000 over six months.
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'Ebola an international health emergency'
The WHO says West Africa's Ebola epidemic is an “extraordinary event”.
