Lab-grown sperm makes healthy offspring

Sperm have been made in the laboratory and used to father healthy baby mice in a pioneering move that could lead to infertility treatmen...

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Zika: The key unanswered questions

This grainy image is one of the few pictures of the Zika virus. The infection has prompted the World Health Organization to declared a...

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Zika outbreak: What you need to know

The World Health Organization has declared the Zika virus a global public health emergency. The infection is suspected of leading to ...

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Ebola 'devastates long-term health'

Most people who survive an Ebola infection will have long-lasting health problems, say doctors from the US National Institutes of Health...

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