viral infection blood immunity fights disease white cells attack viruses |
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| navigate by keyword : abstract antibody attack bacterium biology blood cell cells closeup coronavirus covid19 defense design disease epidemic epidemiology evolution fever fights flu germs health hiv illness illustration immune immunity infection infectious influenza leukocyte macro medical medicine microbe microbiology microscope microscopic mutation mutations nature organism pandemic pathogen plant research science scientific vaccine viral virology virus viruses white |
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| Viral infection in blood. Immunity fights disease. White blood cells attack viruses. Viral mutations and immune defense 3D illustration |
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