Nearly 80 genes that could be linked to depression have been discovered by scientists.
The findings could help explain why some people may be at a higher risk of developing the condition, researchers say.
The study could also help researchers develop drugs to tackle mental ill-health, experts say.
Depression affects one in five people in the UK every year and is the leading cause of disability worldwide. Life events – such as trauma or stress – can contribute to its onset, but it is not clear why some people are more likely to develop the condition than others.safeii