Antibody test

I have been asked to take part in a Coronavirus antibody testing research study run by Imperial College, London.  It's to see how many people in the study have antibodies in their system.

I had to do a finger prick test then add a buffer liquid and pink lines show my positive result.  My test shows that I have one of the two antibodies looked for (although they stress that it's not 100% accurate). A photograph of the result and the filling in of an online questionaire complete the process.  I hope that it's correct and that I have the antibodies.