contact tracing app covid pandemic coronavirus mobile application people wearing face mask using smart phone |
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| navigate by keyword : 2019ncov aid alert app application city contact coronavirus covid danger data digital distancing egov face government infection internet lockdown mask mobile outbreak pandemic people phone pneumonia protective respiratory response safety security service sign smart software street tracing using walking wearing women young |
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| Contact tracing app COVID-19 pandemic coronavirus mobile application. people wearing face mask using smart phone app in city street to aid contact tracing in response to the 2019-20 Coronavirus Pandemic. |
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