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SARS-CoV-2 virus, the origin of the Omicron, BA.2, and Delta variants, under a microscope
Gloved hands testing a COVID-19 sample in a lab
SARS-CoV-2 virus, the origin of the Omicron, BA.2, and Delta variants, under a microscope
A doctor wearing a mask and scrubs holds up a syringe with a vaccine inside