COVID-19 — Manitoba schools getting ready to test non-vaccinated staff as mandate deadline nears But because of the two-week immunization period, affected employees will need to get their second shot by Monday, or instead provide proof of a negative test within 48 hours before a shift.That means full-time teachers and other school staff who are not fully vaccinated will face testing three times a week.Some divisions, like Winnipeg’s Seven Oaks School Division, have already started testing.“There’s a small number of our employees that have opted for testing,” said Brian O’Leary, superintendent at Seven Oaks, where roughly 98 per cent of staff has been fully vaccinated.“I think people have been living with this and want to get back to a.