Uncategorized Ontario has largest increase in COVID-19 cases yet SHARE ON: Wendy Gray, staff Thursday, Mar. 26th, 2020 Illustration of Severe Acute Respiratory Syndrome coronavirus 2, the cause of COVID-19 (Alissa Eckert, MS, Dan Higgins, MAMS) Ontario has 170 new cases of COVID-19. That is the largest single increase in one day. That brings the provincial total to 858. 13 people have died, eight people have recovered and over 26,000 have tested negative.