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Life

Ebola after-effects unclear as nurse becomes critically ill

Health

Flu drugs work and are needed during pandemics

Life

ISIS could be using decades-old mustard gas in Syria

Life

Why welcoming more refugees makes economic sense for Europe

Life

Ban on chimp testing puts wild ape vaccine for Ebola at risk

Earth

Europe to discuss deep-sea trawling ban to protect biodiversity

Earth

China crash a sign of nation's transition to a new economy

Health

Hidden viral protein brings universal flu jab closer

Technology

How historic Iran deal will block nuclear weapons – for a while

Greece crisis: Better models can show how to stabilise eurozone

Life

Cod make a comeback thanks to strict cuts in fishing

Health

Bolster health systems in poor countries or see another Ebola