Some words of caution from federal officials in this week’s COVID-19 update. Chief medical health officer Dr. Theresa Tam says while infections are still trending lower, there could be a resurgence when mask mandates are ended, adding masks are still a good first line of protection. Saskatchewan’s indoor mask mandate ends Monday. Health officials also continue to monitor BA-2 sub lineage of the COVID-19 Omicron variant, which makes up 10% of samples.