Posted: Apr 23, 2021 8:59 AM ET | Last Updated: April 23 Health-care workers prepare to test passengers as they arrive at Toronto's Pearson airport in this Feb. 1, 2021 photo after mandatory COVID-19 testing took effect for international arrivals. Public Health Ontario said Friday it has detected 36 cases of the B1617 variant first identified in India. (Carlos Osorio/Reuters)