We are chasing Ebola virus - it is ahead of us, WHO warns

The lead

Infection rates are high, adding to concern that authorities are struggling to get to grips with the disease

What shifts

For those following chasing, ebola, virus, warns, this report from BBC introduces a variable that could shift existing calculations.

The wider picture

Earlier reporting from BBC and comparable outlets sketched the conditions that would eventually produce an event like this.

Where this fits in Signal Ledger

Related coverage from the World desk.

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The editorial line

Signal Ledger reads this through the lens of chasing, ebola, virus, warns: Infection rates are high, adding to concern that authorities are struggling to get to grips with the disease.