Send the following on WhatsApp
Continue to ChatYes, filter NPHET but filter the air in classrooms first https://derekmooney.ie/2021/12/07/yes-filter-nphet-but-filter-the-air-in-classrooms-first/
Yes, filter NPHET but filter the air in classrooms first https://derekmooney.ie/2021/12/07/yes-filter-nphet-but-filter-the-air-in-classrooms-first/