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 asia bluetooth business city concept contact coronavirus covid covid19 crisis danger device digital disease face girl lockdown mask medical mobile outbreak pandemic phone pneumonia privacy response security sign smart street surgical tracing tracking urban using walking 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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