a medical worker holding a centrifuge tubes with graduated marks with a omicron covid-19 variant of sars-cov-2 virus sample

africa b1617 biology care centrifuge change closeup concept contagious coronavirus country covid19 crisis danger dangerous death disease epidemic flag flu graduated health help holding indian infection isolated lineage macro marks medical medicals mutation new omicron outbreak pain pandemic prevention problem protect quarantine render representation risk sample sarscov2 south symbol tubes vaccine variant variation viral virus warning worker