الصفحة الرئيسيةYahoo News - Latest News & Headlines An unvaccinated teacher spread COVID-19 to 50% of students in a classroom after taking off a mask to read, CDC says byHasibul Hasan —أغسطس 28, 2021 0 from Yahoo News - Latest News & Headlines https://news.yahoo.com/unvaccinated-teacher-spread-covid-19-211200944.html
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