Failing to open curtains fully makes people more likely to get sick, a new study suggests.
It found sunlight kills disease-causing bacteria that live in dust, while darker conditions let them thrive. The findings were published in the journal Microbiome.
Researchers warned the problem also affects windowless offices.
Study leader Dr. Ashkaan Fahimipour said: “Humans spend most of their time indoors, where exposure to dust particles that carry bacteria, including pathogens that can make us sick, is unavoidable.”
“Therefore, it’s important to understand how features of buildings we occupy influence dust ecosystems and how this could affect our health.”