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Red flags with Alberta’s contact tracing as 43% of new cases have no known source

COVID-19 cases are rising in Alberta, and there are concerns that difficulties involved in contact tracing — both manual and digital — could hamper the province’s ability to slow the spread. A public health nurse conducts a contact-tracing phone call in Wyoming in July. As Alberta’s COVID-19 numbers continue to surge, concerns are growing about contact tracing…

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