Evidence that air cleaners stop germs is still lacking
A new scientific review has found that many of the air-cleaning and ventilation technologies being used to stop the spread of diseases like COVID-19 and flu have not been clearly proven to protect people in real life.
An improved air filter, inspired by the human nose
Scientists in South Korea have developed an air filter, inspired by the human nose, which is 10% to 30% more efficient in filtering particles of various sizes.