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Top down view on a construction site worker in orange high visibility vest and white hard safety hat cutting electric cables to a specific size. Selective focus. Wiring a house concept.
B cells are at the centre of the adaptive humoral immune system and are responsible for mediating the production of antigen-specific immunoglobulin (Ig) directed against invasive pathogens
Negative covid-19 antigen test isolated on white background
Specific icon graphic design. Vector icon illustrations
PSA (Prostate-Specific Antigen) blood test tube- vector illustration

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