Preventing the introduction of SARS-CoV-2 into school settings.

See related research at www.cmaj.ca/lookup/doi/10.1503/cmaj.202065 KEY POINTS Children with severe acute respiratory syndome coronavirus 2 (SARS-CoV-2) infection are most likely to be asymptomatic, or to present with mild to moderate symptoms. Fever, cough and rhinorrhea were the most common symptoms among children tested for SARS-CoV-2 infection, regardless of whether they tested positive or negative. Given that symptoms such as headaches and rhinorrhea are common among school-aged children even in the absence of an infection, it would be important to determine the positive predictive value of these symptoms for COVID-19, particularly as isolated symptoms.