Nope. Been debunked for both infections and allergens.
https://publichealth.jhu.edu/2022/is-the-hygiene-hypothesis-true
Category: Folkhälsomyndigheten
Air-Cleaners & Ventilation Matters!
This important study shows the importance of excellent ventilation! This pretty much confirms the results of a number of smaller studies including those with Corsi – Rosenthal boxes.
This is of course applicable to offices and other indoor settings as well. Ideal is of course to improve ventilation, but air-cleaners can be a viable solution as long as you get the air filtered at least 6x per hour, as shown in other studies (link coming soon).
Combining the air cleaners with FFP2/N95/KN95 masks would likely stop spread of the virus in the setting pretty much 100%. Even with super-spreading variants of Omicron BA.5 and later dominating.
This overturns all the desinformation from big players like the Swedish Public Health Authority Folkhälsomyndigheten and Koch sponsored desinformation machine Brownstone Institute.
First the link to the Reuters article, second lik is to the study itself.
Swedish health authority Folkhälsomyndigheten among a few others, UK government etc, have claimed that children don’t spread Covid and that schools aren’t driving the spread. Most epidemiologists disagreed from the very start and just watching statistics on age groups have given proof to the view of schools actually being the major force in driving the pandemic. Here is solid proof. That’s why it is very important to use counter measures in schools in order to slow down spread in society as a whole.