Planning to travel in the next few weeks, and seeking some reassurance that the vaccine "worked", I took the T-Detect test[1] last week. It came back negative for adaptive T-Cell response. Now, before anyone attacks me for getting this test for the wrong reasons, I'm just trying to gather as much information as I can. From what I've seen in online chatter, it seems that most people getting this test are getting it to justify avoiding getting a vaccine; I got it for the opposite reason. I went in knowing what it says in the FDA FAQ[2] about the test:

> "...the meaning of a positive result in individuals who received a COVID-19 vaccine is unknown."

It also says:

> "The meaning of a negative test result for individuals that have received a COVID-19 vaccine is unknown."

But obviously, it would be better to have a T-Cell response than not to have one.

I know that some antibody tests only show antibodies induced by infection, while specialized others show those induced by the vaccines. But would one expect the same differentiation from a T-Cell test? The company is entirely silent on the subject. I'd like to form some rough risk assessment on whether a negative result is an indicator that any post-vaccine immunity I had is reduced or gone.

Thanks for reading.

[1] https://www.t-detect.com/ [2] https://www.fda.gov/media/146480/download