Um...I mean, it's possible to be more wrong than this post, but you'd really have to try.
Vaccines don't contain antibodies.
Plasma does, and donating COVID-19 plasma is a thing. But you're only allowed to donate twice per seven days, maximum. Even if each donation instantly cures a hundred people, which it wouldn't, but even if it did, that's 1,000 and change per year.
Someone's been watching The Incredible Hulk too much.