Posted on August 30th, 2021 by Phill Snel Prof. Jeffrey Siegel | What are HEPA filters and how effective are they in Ontario classrooms? August 27, 2021 | Toronto.com
Posted on May 27th, 2021 by Phill Snel Prof. Jeffrey Siegel | Caution to the Wind: Desperate to reopen and loaded with stimulus cash, schools are spending millions on high-tech purifiers. But are they safe? May 27, 2021 | Mother Jones
Posted on May 13th, 2021 by Phill Snel Prof. Jeff Siegel | Schools spending millions on air purifiers often sold using overblown claims May 12, 2021 | KAKE, ABC online
Posted on October 8th, 2020 by Phill Snel Prof. Jeffrey Siegel | Teachers’ unions, experts pan Ontario’s back-to-school plan October 8, 2020 | National Observer
