https://www.siliconvalley.com/2021/11/08/is-your-covid-19-vaccine-working-the-future-of-antibody-testing-so-far/

With troubling evidence that COVID-19 vaccines lose their effectiveness over time, Americans are wondering: Is my shot still doing its job?

Today’s commercially available tests can’t tell you. But a new generation of more innovative tests is on the horizon, promising to provide a more reliable prediction of immunity — and reduce the risk of breakthrough infections.