London, UK, 22 January 2024: A swab for a covid test in a tube of extraction buffer solution, preparing for a coronavirus Flowflex test at home. Anna

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London, UK, 22 January 2024: A swab for a covid test in a tube of extraction buffer solution, preparing for a coronavirus Flowflex test at home. Anna Watson/Alamy

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Photo credit: © Anna Watson / Alamy / Afripics
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Keywords: antigen, buffer, cases, coronavirus, covid, covid-19, extraction, flow, home, lateral, rapid, sample, sars--2, solution, swab, test, tube