immune system protection from infectious diseases concept shield virus and bacteria cells background |
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| navigate by keyword : background bacteria bacterial biology blue body care cell cells clinic concept covid19 dark defense design disease diseases flu germ glowing health healthcare healthy human hygiene icon illness illustration immune immunity immunization immunology infection infectious low medical medicine microbe microbiology polygonal prevention protection protective research resistance resistant safety science shield strong symbol system vaccination vector viral virus white |
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| Immune system protection from infectious diseases concept shield, virus and bacteria cells background. Microbiology, immunology. Vector illustration |
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