Built-in mechanical ventilation and portable air cleaners, used by hospitals to help mitigate the spread of viruses, may actually spread viruses and other pathogens in some instances, according to new research from scientists at the University College London. Particle spread was uneven: In some scenarios, particles were reduced by ventilation and PACs by up to 96%. But the authors also noted that neighboring rooms had unexpectedly increased aerosol migration of 29% due to exhaust mechanics.
