Students wearing face masks are seen at a school in Vancouver, British Columbia, Canada, Sept. 21, 2020. COVID-19 exposures have been reported in at least 20 schools in British Columbia since students returned to classrooms two weeks ago. (Photo by Liang Sen/Xinhua)
COVID-19 exposures reported in at least 20 schools in British Columbia
Source: Xinhua| 2020-09-22 07:32:35|Editor: huaxia