I wanted to know how long someone would take to seroconvert or produce antibodies if they have CVID. I tested 8 years and 5 years after possible exposure. Multiple tests on the Abbott Architect and one on Ortho Vitros ECi kit which is a third generation one. All of them non reactive with values ranging from 0.12 to 0.19. I was anxious about group O has well due to my exposure in Europe and probably that is what this has boiled down to. Should I go in for a PCR RNA or just leave it at this.