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