Concepts of coronavirus or covid-19 vaccine and antibody titer. Titer increasing after second injection. Illustration of syringe, vaccine bottle and g

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Concepts of coronavirus or covid-19 vaccine and antibody titer. Titer increasing after second injection. Illustration of syringe, vaccine bottle and graph.

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Size: 5000px × 3500px
Photo credit: © srikijt / Alamy / Afripics
License: Royalty Free
Model Released: No

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