Antibody test from imperial college London

[EasterIssland]

Hi
Has anyone else had a letter from the imperial - nhs related with the study they’re doing for covid antibodies ? Got it this week and had to say before today whether I wanted to take part. They want to know what % of uk has had it.

I’m 99% sure I’ll be negative but son and husband and my family were ill with flu in the last Xmas and I had 37-37.8 and not dry cough in April so wonder whether I’ll have had it but not had any symptoms.

DS did the Imperial College test last weekend. It was negative. No idea how accurate the test is.

I did the Imperial test yesterday.

I have not had any symptoms or so much as a sniffle since December, yet my test was positive. I am really shocked, I was 100% sure I would test negative.