Since I will be traveling I needed to have a positive antibody test or a negative covid test. I had my first vaccine (Moderna) on Dec 31 and my second dose on Jan 28. I had my antibody test on Jan 29. I figured 4 weeks after my first dose I would for sure have at least some antibodies but my test came back negative. I am in the medical field but with very limited knowledge on immunity. I assume even with negative antibodies that I still have immunity through T-cells??? Can anyone with more knowledge enlighten me - I'm just really curious about how all this works. Also I had a huge reaction (chills, rigors, sweating, headache) after my second dose.