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U.S. National Institutes of Health

Liberia Ebola vaccine trial 'challenging' as cases tumble

3 years, 8 months ago
A steep fall in Ebola cases in Liberia will make it hard to prove whether experimental vaccines work in a major clinical trial about to start in the country, the head of the U.S. National Institutes of Health (NIH) said.

A nice, bright smile: Scientists use lasers to regrow teeth

4 years, 4 months ago
WASHINGTON: Scientists have come up with a bright idea - literally - to repair teeth. And they say their concept - using laser light to entice the body's own stem cells into action - may offer enormous promise beyond just dentistry in the…