Canada’s official guidance on the novel coronavirus has been to test patients who recently travelled to affected areas, but some doctors and hospitals have expanded testing on their own, finding the first in a series of patients linked to Iran before the scale of the Iranian outbreak was known, according to a report by Reuters.

One unlikely catch was British Columbia’s sixth patient, who had recently travelled from Iran but would not have been tested under federal guidelines at the time as the country only declared its first case on February 19. But the woman had been on multiple international flights, so a clinician in Vancouver tested anyway and discovered the case.

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