Raw LLM Responses

No you're right. I'm a med school grad and just studied this stuff. Antibodies constantly in the system isn't how immunity works. It's memory cells that come into action if the initial. Generic immune response is unable to beat the infection. There are a few antigens that you may still find such as in Hepatitis but antibody levels are not what you generally test for unless someone has an active infection. Most people have some form of vaccination. But it doesn't mean you have the antibodies floating around in your bloodstream at high or significant levels for every vaccination you've had.