All Yellowknife schools to close as 6 new cases and 10 probable cases of COVID-19 identified Several public exposure notices have been issued following news that the outbreak at N.J. Macpherson School now includes six cases of COVID-19 and 10 probable cases of the illness. Social Sharing CBC News · Posted: May 02, 2021 11:09 PM CT | Last Updated: May 3 The city of Yellowknife on May 2, 2021. Schools in Yellowknife, Ndilo and Dettah move to remote learning on Monday, May 3, as public health officials grapple with a growing cluster of COVID-19. (Sara Minogue/CBC) Several public exposure notices have been issued following news that the outbreak at N.J. Macpherson School in Yellowknife now includes six cases and 10 probable cases of COVID-19.