"A team of researchers backed by Alzheimer’s Research UK and the Alzheimer’s Society have launched a £5m project to trial simple blood tests in the NHS, with the hope of speeding up diagnosis and reaching more people. They aim to be able to determine whether someone has the disease using a single drop of blood."

https://www.theguardian.com/society/2023/nov/09/simple-blood-tests-for-dementia-to-be-trialled-in-nhs