Antigen tests are faster and less expensive than molecular tests (PCR), therefore, some experts consider them to be more feasible for coronavirus testing of large numbers of people. However, antigen tests may not detect all active infections, as they do not work the same way as a PCR test.
British authorities will soon offer arriving international travellers a way to shorten quarantine if they test negative for COVID-19.
The UK’s coronavirus testing system – for so long a source of embarrassment for ministers – could get a major boost with millions of new fast turnaround tests, Boris Johnson has said.