A new rapid test that tells users within 20 minutes whether they’ve contracted the coronavirus is being tested in the U.K.

It comes just days after the Trump administration promoted a similar test made by U.S.-based pharmaceuticals giant Abbott Laboratories.

The U.S.’s Food and Drug Administration, however, later cautioned the public about the reliability of the Abbott ID NOW test, warning: “We are still evaluating the information about inaccurate results and are in direct communications with Abbott about this important issue.”.

See:Abbott’s coronavirus test may need a backup for false negatives.

Trials of the new rapid coronavirus test returning results in 20 minutes began in Hampshire, in southern England, on Thursday.

Receiving results instantly, with no need for test samples to be sent to a laboratory to be processed, will mean people with symptoms are given immediate certainty as to whether they have the virus.

Hancock said: “This new test could provide accurate results almost on the spot.

The separate antibody test is being prioritized for health workers.

Ten million tests so far have been secured with companies including Roche and Abbott Labs, and the government said these will be rolled out over the coming months, with further agreements being negotiated with suppliers to provide millions of laboratory-based antibody tests.

Hancock said: “A positive test result for antibodies, whichever test is used, does not currently mean that the person being tested is immune to COVID-19.