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British Columbia school officials order windows screwed shut to stop teachers from ventilating classes amid raging pandemic Officials at Godson Elementary School in Abbotsford, British Columbia ordered classroom windows at the school bolted shut in late January. Teachers at Godson had been opening the windows to increase air circulation out of fear that the school’s existing ventilation systems were not providing an adequate fresh air supply to reduce the risk of COVID-19 transmission. The school sent contractors into the building who, according to the school, found “safety issues” with...

High CO2 is a good proxy for poor ventilation. This little instrument looks like it could be useful. * * * “A Reader’s Guide to Safety & Adverse Event Data From Vaccine Trials” [Hilda Bastian, PLOS]. Lots of good tips. Here’s one: “Solicited adverse events are a list of events/symptoms that participants are specifically asked to record. If that’s not done in a consistent, structured way, the rate of adverse events is likely to be under-estimated. The less thoroughly researchers look, the fewer they’ll find – and the rate of adverse events they report could be artificially low....

Officials at a school in Abbotsford, B.C., had windows in the building either screwed shut or blocked from opening wider than a few inches after teachers began using them to compensate for poor ventilation, says the Abbotsford Teachers' Union.

School officials order windows screwed shut after teachers opened them to increase ventilation Teachers at a school in Abbotsford, B.C., started opening classroom windows after learning in December that there was no ventilation system in an older wing of the school. But many of the windows were later screwed shut, with school officials citing safety issues. Social Sharing Abbotsford teachers say fresh air was compensating for lack of ventilation system in older wing of school Posted: Feb 20, 2021 7:00 AM PT | Last Updated: February 20 Godson Elementary School in Abbotsford, B.C., houses kinde...