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COVID-19 Testing in Patients with Cancer: Does One Size Fit All?

The COVID-19 global pandemic has drastically impacted cancer care, posing challenges in treatment and diagnosis. There is increasing evidence that cancer patients, particularly those who have advanced age, significant comorbidities, metastatic disease, and/or are receiving active immunosuppressive therapy may be at higher risk of COVID-19 severe complications. Controlling viral spread from asymptomatic carriers in cancer centers is paramount, and appropriate screening methods need to be established. Universal testing of asymptomatic cancer patients may be key to ensure safe continuation of treatment and appropriate hospitalized patients cohorting during the pandemic. Here we perform a comprehensive review of the available evidence regarding SARS-CoV-2 testing in asymptomatic cancer patients, and describe the approach adopted at Princess Margaret Cancer Centre (Toronto, Canada) as a core component of COVID-19 control.