![]() In the UK, an antigen test called the Innova lateral flow test was piloted in the city of Liverpool as part of the government’s plans to carry out mass vaccinations in the country. When it comes to rapid tests, the person who administers the test can be crucial.PCR tests are considered the gold standard because they are generally highly sensitive and highly specific. On the other hand, a highly specific test runs a risk of false negatives if the test’s sensitivity is poor, but will generally have a low false positive rate. ![]() In general, a highly sensitive test has a low false negative rate but runs a risk of false positives if its specificity is not up to scratch. Sensitivity is defined as the proportion of patients with Covid-19 who correctly get a positive result, while specificity is the proportion of patients without an infection that the test correctly identifies as negative. These two measures are used to determine the credibility of a test: ‘How well does it detect disease, and how well does it detect the absence of disease,’ explained Prof.
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