Wtf? Negative antibody test, absolutely sure I've had it

[Aisforharlot]

I had a venous antibody test as part of a trial, which has come back negative.
But I'm 99.9% certain I've had and got over the virus.
Had all the symptoms - dry cough, short lived fever, heavy chest, fatigue for a month, loss of taste and smell.
My partner also had loss of smell, cough and delirium.

I've never lost taste and smell like that before with any illness, ever. I'm damn sure I've had it.

So why the result? Can anyone shed some light?

Prof Gupta of oxford uni has said the following

• you might not develop antibodies if your immune system is strong enough to fight it off or your infection is week
• you may already have some level of immunity from something else and therefore not need to develop antibodies to fight it off.

It's in the unherd channel on YouTube.

@Aisforharlot not sure! Maybe I made antibodies and they didn’t last. Maybe it’s a false negative. Maybe my immune system fought it off before I produced antibodies, when unwell I was fortunate that it was very mild.

I used PPE but I definitely can’t say I never let me guard down on covid wards. Who knows.

Mid Feb to early March we all had the virus symptoms here. Mil had it too, with a positive test in hospital.

DD and DS had identical symptoms but DD had it much milder. Her antibody test came back negative and his positive.
I'm sure it's a false negative.