By Dan Kedmey
June 4, 2014

Ebola cases have spiked in the west African nations of Guinea and Sierra Leone, according to new figures released by the World Health Organization on Wednesday, undermining local officials’ claims that the virus has been contained.

The outbreak caused a suspected 21 deaths and 37 infections in Guinea between May 29 and June 1. In the same period, Sierra Leone recorded 13 new cases.

The updated tally brings the total number of suspected cases to 328. Health officials have confirmed the presence of Ebola in 193 of the cases so far, making it one of the largest recorded outbreaks in seven years.

Ebola is a highly infectious haemorrhagic fever that can have up to 90% fatality rates.

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