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- Four classes in a school in Sofia quarantined by a teacher with Covid-19 – Sofia DarikNews
- 4 classes in a Sofia school are in quarantine due to a teacher with Covid-19 Dnes.dir.bg
- Four classes in quarantine by teacher with coronavirus Novini.bg
- Four classes in quarantine per teacher with coronavirus in the capital 24 hours a day
- By an infected teacher: four classes in a metropolitan school under quarantine Monitor
- See full presentation on Google News
