We're all familiar these days with rapid COVID tests, those over-the-counter swab tests that give us two lines if we're infected with COVID-19, one line if we're not. Now, researchers have come up with a different test that measures whether you're protected from COVID, and not whether you have it.
The test works with a simple finger prick, and could answer the questions: "Am I protected today?" and "Do I need a booster?"
This segment aired on August 24, 2022.