With more than 40 percent of people with COVID-19 showing no symptoms, many people want to know whether or not they have had the virus.
The answer to that is a fast, reliable antibody test.
Scientists at the University of Exeter have developed one and are ready for it be manufactured and used around the UK.
It is a highly sensitive test, with a process which appears deceptively easy.
A tiny prick of blood is put in a mini test-tube and run through a testing machine.
And this is where the invention comes in.
In the testing machine there are 170 sensor spots – these are a collection of nanoparticles…