| Does the test become invalid after 15 minutes? My DD took a test this morning and I thought it was negative, but a couple hours later i saw a shadow, and now another hour has passed and it looks like a very very feint line. We do have a direct exposure. She had a mild runny nose two days ago, tested negative yesterday, and has no other symptoms at present. |
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No, the tests get weird after the 30 minute window.
You should do more than one test at the recommended interval, though. One rapid is not enough. |
| I believe most tell you not to read after 30 minutes. So therefore it’s probably not a valid result at this point. To be certain, check the instructions. If you don’t have the instructions, google for them and check. |
| Follow the directions on the box (which should tell you to test again) |
| No, the results invalid after the time noted on the package. Have her test again later. |
| No. Just like with pregnancy tests, the results aren't valid after the time indicated on the test. |
| The directions specifically say that the results are not valid after 30 minutes! Throw the test away at this point. |