Mamwe masangano anomirira varairidzi, anoti reZimbabwe National Union of School Heads neProgressive Teachers’ Union of Zimbabwe, PTUZ, ari kukurudzira hurumende kuti iendese mberi kuvhurwa kwezvikoro kusvika panopera chando senzira yekudzivirira kupararira kwedenda reCovid-19 muzvikoro.