A teacher welcomes students before the start of their high school graduation exams, during the spread of the coronavirus disease (COVID-19), at the Gymnasium Steglitz school in Berlin, Germany, April 20, 2020. (Photo/Agencies)
A teacher welcomes students before the start of their high school graduation exams, during the spread of the coronavirus disease (COVID-19), at the Gymnasium Steglitz school in Berlin, Germany, April 20, 2020. (Photo/Agencies)
A teacher welcomes students before the start of their high school graduation exams, during the spread of the coronavirus disease (COVID-19), at the Gymnasium Steglitz school in Berlin, Germany, April 20, 2020. (Photo/Agencies)
Disinfectant is seen before the start of the high school graduation exams, during the spread of the coronavirus disease (COVID-19), at the Gymnasium Steglitz school in Berlin, Germany, April 20, 2020. (Photo/Agencies)
A teacher welcomes students before the start of their high school graduation exams, during the spread of the coronavirus disease (COVID-19), at the Gymnasium Steglitz school in Berlin, Germany, April 20, 2020. (Photo/Agencies)
