Scientists say new approach means effects of many genetic mutations can be analysed at once and yield results in days

A new blood-based test that could help speed up diagnoses for children born with rare genetic disorders has been developed by researchers in an effort to provide answers – and treatments – sooner.

Rare genetic disorders include a host of conditions, from cystic fibrosis to diseases relating to the mitochondria – the powerhouses of our cells. However, getting a diagnosis can be arduous.