Lateral flow assays, also called immunochromatographic assays, identify or measure biomolecules in intricate samples like blood, saliva, urine, or other fluids to diagnose numerous medical conditions.

"Essentially, if *any* line appears before the end of the interpretation window (check leaflet, often this is 30 minutes), then this is a *positive* test and you must isolate and book a PCR.

Gold antibodies that haven’t bound to the virus carry on up the strip where they meet a third set of antibodies, not designed to pick up Covid-19, stuck at the C (for control) line.

So if you're reaching for a lateral flow test, here are a few things you should know. ... You probably know that if only the control line (C) appears, it's a negative test.

THESE are the seven key things you need to know about lateral flow tests. Lateral flow immunochromatographic assays or rapid tests, sometimes called LFTs, can be used to get a Covid test result wit… ...

When reading a lateral flow results, one pink/red line next to the control marker C means you've got a negative results. A second line next to marker T (test) is a sign of a positive result.

A positive lateral flow test — no matter how faint — must be treated as a definite Covid-19 case as the home testing kits are “very reliable”, a Queen’s University virologist has said.

Although lateral flow tests are no longer free in England, people may want to continue using them if they have symptoms of Covid-19. A line next to the ‘C’ means the test has worked, as the C ...