Staff at Park Lane Academy process students’ Covid-19 lateral flow tests on the first day of term, in Halifax, northwest England on January 4. (CNN)As Covid-19 cases skyrocketed across Britain in late December, Stuart Guest spent his vacation poring over scientific reports about air cleaning and filtration systems.

Guest, a head teacher at an elementary school in Birmingham, England, scoured Amazon for affordable air purifiers in the hopes of stopping the more transmissible Omicron variant from spreading among his 460 students, who are between 3 and 11 years old.

The British government recommends two models made by Dyson and Camfil, but […]

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By Donato