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HEALTH-CORONAVIRUS/GERMANY-SCHOOLS VENTILATION
RTX88ZI3 
November 12, 2020 
Pupils attend their French lesson in a classroom equipped with a ventilation system developed by scientist... 
MAIN, Germany 
Outbreak of the coronavirus disease (COVID-19) in Mainz 
Pupils attend their French lesson in a classroom equipped with a ventilation system developed by scientist Frank Helleis for school classrooms only made from material available at do-it-yourself shops as the spread of the coronavirus disease (COVID-19) continues in Mainz, Germany, November 12, 2020, REUTERS/Kai Pfaffenbach 
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