We're half a decade into studies finding that improving airflow in classrooms will reduce disease transmission enormously, and that bleaching surfaces etc. does very little. And yet nothing changes. Waves of flu and colds wash over schools, and the schools pretend it's an act of God.
The relative contribution of close-proximity contacts, shared classroom exposure and indoor air quality to respiratory virus transmission in schools - Nature Communications
The relative importance of close-proximity interactions, shared space and air quality to the transmission of respiratory viruses is not well understood. Here, the authors investigate this question by ...