CDC acknowledges significant harms of N95s due to CO2 buildup (https://t.co/JQWka8tvhG)👇
— Kevin Bass PhD MS (@kevinnbass) August 1, 2023
To avoid these, CDC recommends not wearing N95 for more than 1 hour.
In other words, all-day use advocated by Covidians causes harm, without demonstrated benefit. pic.twitter.com/AVUsv9m7vz