Saturday was a significant breakthrough for Sierra Leone in its struggle with Ebola.
World Heath Organzation officials said the country has gone 42 days without a transmission of the virus, which is twice the maxicum incubation period.
The country will be monitored for an additional 90 days now, WHO Sierra Leone Representative Anders Nordstrom said.
The outbreak has claimed almost 4,000 lives, making it the worst in history.
The Associated Press contributed to this report.
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