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Scientist holds vial of blood sample with positive result for covid-19 infection of new variant in UK, concept image
Female doctor holds a face mask with - Omicron variant text on it. Covid-19 new variant - Omicron. Omicron variant of coronavirus. SARS-CoV-2 variant of concern
Delta variant COVID-19 positive, blood sample tube positive with delta variant or Indian strain COVID-19
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