danger zone stop epidemic virus concept infection critical number density susceptible hosts |
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navigate by keyword : analysis antibiotic bacteria caution concept coronavirus critical danger density diagnosis disease doctor epidemic fever flu gesture health hematology hospital hosts ill illness infection lab man mask medical medicine number nurse open outbreak palm pandemic pneumonia protective quarantine respiratory risk stop susceptible syndrome threshold vaccine virus zone |
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Danger zone. Stop epidemic. Virus concept. Epidemic infection. Critical number or density of susceptible hosts. Epidemic threshold. Man in medical lab. Protective mask. Open palm stop gesture. |
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