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 bluetooth business city contact control coronavirus covid crisis epidemic face health install mask mobile outbreak outdoor pandemic person phone pneumonia protection protective quarantine response self sign smart smartphone software street technology tracing urban using wearing woman 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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