17/12/2021
Lateral flow tests (LFTs) also known as lateral flow immunochromatographic assays or rapid tests, are simple devices intended to detect the presence of a target substance in a liquid sample without the need for specialized and costly equipment.
LFTs operate on the same principles as the enzyme-linked immunosorbent assays (ELISA).
How to take the test:
Taking a lateral flow test usually involves taking a sample from the back of the throat near the tonsils and the nose, or from the nose only, using a swab.
The swab is dipped into an extraction solution. This is then dripped on to the device's paper pad, producing the reaction that gives the result.
The tests give a quick result, as the sample does not need to be sent to a lab.
Test Result:
Negative result: one line next to C shows the test is negative.
Void: no lines, or one line next to T, means the test is void. You will need to re-take with a fresh test kit.
Positive result: 2 lines, one next to C and one next to T, even faint lines, shows the test is positive.