ZIMBABWEAN authorities have closed a boarding school in the west of the country after at least 100 students tested positive for coronavirus, a state-owned newspaper has reported. The school in the Matabeleland North province is the first to report a significant spike in infections since schools began re-opening for end-of-year examinations in September. It is also the first to be closed over a cluster of positive cases. Authorities fear that the country could see a surge after infections increased this month. New cases jumped to 294 last week compared to 109 new cases in the previous week, according to the…