virus pathogen particle interacting infecting breaking into body cell the affected disease | 
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| navigate by keyword : affected agent aids attack body breaking care cell cellular closeup concept contagion contaminate contaminated corona coronavirus covid danger defense disease entering epidemic epidemiology flu health hepatitis human illness immune immunity immunization incubation infect infected infecting infection influenza interacting medical membrane microbiology microscopic organism pandemic particle pathogen plaque process protection receptors replication resistance spread symptoms tentacles transmission vaccine virology virus wall 		 | 
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| Virus pathogen or virus particle interacting, infecting, or breaking into a body cell. The body is affected by a disease, the covid-19 coronavirus. Health protection, the danger of disease concept. | 
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