Okay, so I was exposed with two people who has the virus. I was with these people for 2 days. They were already coughing and not feeling good, (but thought it was just a cold.) one was tested postitive for covid as she got worse and the other one tested positive as well for covid.....so then I had to go get tested. I came back negative and was negative for the antibodies as well. Could my immune system be able to fight the virus without needing the antibodies? If this is the case, and I am sure there's many others out there like me, why in the world would I take the vaccination when my body can already fight it on its own?
Same goes with the flu. I have never got that either....and have never gotten the flu shot to prevent it. In fact, I heard of people becoming very sick after taking the flu shot.
This is where I think your own self should be the one making the decisions of what's best for ourselves. We know ourselves better than anyone else. I become very leery when the government, who knows how to line their own pockets far better than helping its own citizens, tells me what they think is 'best for me.'
Coronavirus is just a cold, or perhaps more precisely, what people call "a cold" is caused by a coronavirus (not SARS-cov-2 but one of the relatives of it).
The antibody test looks for a "lock and key" with the spike protein. But a real virus is a 3-D shape with multiple surface proteins and other molecules attached. In general an antibody will match to any possible structure the real virus coat can make. For instance, it could match to part of a spike protein and part of another spike protein and/or some area of the surface in between. Note: I am not 100% certain of the shape and dimensions of the surface of SARS-cov-2 because I haven't really looked into it (don't care) but this is how it works in general. An Ab can match to any part of the viral body surface. You could have such antibodies from previous exposure (or this exposure).
So if you don't match to the spike protein, that doesn't mean you don't match to the virus. It CAN mean that, but it doesn't necessarily mean that.
It's also possible that an Ab for some other coronavirus is a sufficient match that it causes an immune response.
It could also mean that you encountered it, but it couldn't take hold because you are not vitamin deficient and your cells just fought it off. It could even be some genetic reason, like a slightly different ACE-2 protein structure that decreases binding with SARS-cov-2.
TL;DR Yes.