Health
Schools cut covid-19 sick days by 20 per cent using HEPA air filters
News
Subscriber-only
![A HEPA filter in a classroom at Bowling Park Primary School in Bradford, UK](https://images.newscientist.com/wp-content/uploads/2023/10/20130604/SEI_176713148.jpg?width=300)
News
Free
Features
Subscriber-only
News
Free
News
Free
News
Subscriber-only
News
Subscriber-only
News
Free
News
Free
News
Free
Regulars
Subscriber-only
News
Free