The latest stories from the Health section of the BBC News web site.
Updated: 2 hours 45 min ago
As new research shows most young people do not plan to smoke e-cigarettes, experts are divided over the safety of "vaping".
A trial of an experimental vaccine against the Ebola virus is to begin in Oxford.
Is it time for a mental health waiting time target?
Girths are continuing to expand in the US, despite obesity appearing to be reaching a plateau, data suggests.
Five bugs that lurk in changing rooms
Plight of Moldova's orphanage children
US President Barack Obama calls the Ebola outbreak in West Africa a threat to security worldwide while announcing a larger US role, including 3,000 troops, to help fight the virus.
Debate over the fate of local hospitals
The UN says it needs $1bn to fight the West Africa Ebola outbreak, described as "unparalleled in modern times".
An innovative vaccine delivery method called the Nanopatch is being evaluated by the World Health Organisation in the hope it can be used to help eradicate polio.
Targets to reduce sugar consumption should be much more ambitious, health experts say.
More action is needed to tackle Ebola, say experts
Plans for spending almost £5m raised by teenage cancer patient Stephen Sutton are revealed.
Why are more children in Africa living beyond five?
Almost one in six mental health patients in England have attempted suicide because of long waiting lists for therapy, according to new research.
President Obama is to announce plans to send 3,000 troops to Liberia to help fight the Ebola virus, US officials say.
Plans for spending almost £5m raised by teenage cancer sufferer Stephen Sutton have been revealed.
Poor sanitation has caused serious health problems in Haiti - but could a special eco toilet improve the situation?
The president of Ghana calls for the easing of restrictions on West African countries fighting the ebola epidemic.
The target to reduce sugar consumption should be much more ambitious, health experts say.