The government says more than a quarter of its coronavirus tests have been on people who've been tested before.
A freedom of information query to the Department of Health and Social Care asked for detailed statistics about Covid-19 tests.
In response, the department said as of October 31 it had carried out processed 16,253 tests, with 4,633 duplicates.
In total, 11,620 unique individuals have been screened for the virus.
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