Coronavirus research updates: Virus rips through Israeli school after masking is suspended

"24 July — Virus rips through Israeli school after masking is suspended

More than 150 students at an Israeli secondary school were infected by the new coronavirus after students were allowed to remove their masks during a heat-wave.

Roughly 10 days after Israeli schools fully reopened on 17 May, two students at a secondary school in Jerusalem were diagnosed with COVID-19. Chen Stein-Zamir at the Ministry of Health in Jerusalem and her colleagues investigated the resulting outbreak and found that 153 students and 25 members of staff had become infected (C. Stein-Zamir et al. Euro Surveill. http://doi.org/d4sw; 2020). By mid-June, a further 87 cases had occurred among the close contacts of people infected through the school outbreak.

The virus’s spread was probably aided by a heat-wave that occurred between 19 and 21 May, prompting heavy use of air-conditioning and a suspension of the requirement that students wear face masks. Crowding might also have contributed: each of the school’s classrooms held 35 to 38 students, resulting in space allotments of 1.1–1.3 square metres per student."

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https://www.nature.com/articles/d41586-020-00502-w