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A positive result: Two lines on control (C) and test (T). Negative: One line on control (C).

If you see any line on your COVID test, err on the side of caution and take precautions to avoid spreading the virus to others. While a dark line that shows up quickly is a sign that there's more virus in your body, even a faint line can be positive (and may turn darker if you test again in the coming days).

You might see a line next to the letter C and a line next to the letter T. This means you are positive. You have COVID-19. Only 1 line next to the letter T • No lines at all If there is no line or colour next to the letter T your test is negative.

Read your result One coloured line should be in the control line region (C), and another coloured line should be in the test line region (T). Two lines, one next to C and one next to T, even faint lines, show the test is positive. If you test positive, you and your. household should self-isolate following.

Read your result One coloured line should be in the control line region (C), and another coloured line should be in the test line region (T). Two lines, one next to C and one next to T, even faint lines, show the test is positive. If you test positive, you and your. household should self-isolate following.

If the control assay Ct value is too high, the validity of a target negative sample result is called into question. For example, there might have been a problem with sample collection, extraction, an inhibitor, etc., that could reduce the sensitivity of the assay below an acceptable level.

Cq values are inverse to the amount of target nucleic acid in your sample and correlate to the number of target copies in your sample. Lower Cq values (typically below 29 cycles) indicate high amounts of the target sequence. Higher Cq values (above 38 cycles) mean lower amounts of your target nucleic acid.

Molecular tests, such as polymerase chain reaction (PCR) and other nucleic acid amplification tests (NAATs) tests, which detect genetic material called RNA from the virus. Antigen tests, often referred to as rapid tests or, for some, at-home or self tests, which detect proteins called antigens from the virus.