A member asked:

Hello! i have done clear blue rapid test and the result it negative, but the control window is empty. is it still valid?

Q: hello! i have done clear blue rapid test and the result it negative, but the control window is empty. is it still valid?

: No, it is considered invalid because the control box does not have the mark. You should repeat the test with an early morning urine sample and follow the instruction closely. Good luck.

2 doctors weighed in across 2 answers

Dr. Hiep Le answered

Specializes in Nephrology and Dialysis

No, it is considered invalid because the control box does not have the mark. You should repeat the test with an early morning urine sample and follow the instruction closely. Good luck.

Dr Kuitems agreed

Answered 4/23/2023

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These test can vary from company to company with different manufactures. There should be instructions with pictures showing you what a negative and positive test result looks like and what should show up in the control window.

Answered 5/1/2023

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A member asked:

Hello! i have done clear blue rapid test and the result it negative, but the control window is empty. is it still valid?

2 doctors weighed in across 2 answers

Dr. Hiep Le answered

Dr Kuitems agreed

Dr. Frank Kuitems answered

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