The dust in our homes contains an average of 9,000 different types of fungi and bacteria, a study suggests.

Up to five million people in England are at risk of developing type-2 diabetes, according to new data from Public Health England.

People genetically prone to low vitamin-D levels are at increased risk of multiple sclerosis, a large study suggests.

Scientists identify the condition aphantasia, in which people cannot create images in their head

Surgeons in London use lasers to diagnose abnormal tissue during an operation to remove a brain tumour.

The impact of hay-fever at exam time could be harmful enough to mean that some students might miss out on a university place, say researchers.