Wearing a used mask 'can be WORSE than not wearing one at all', study suggests
Wearing a used mask can be less effective at protecting against
coronavirus than not wearing one at all, a new study suggests.
Researchers looked at three-layer surgical masks, which are very common among healthcare professionals.
They found that, when new, these masks can filter out nearly three-quarters of tiny particles that linger in the air and are most responsible for infection.
But, when used more than once, they filter out just one-quarter of the minuscule droplets because the masks become deformed with each wear.
Wearing a used mask 'can be WORSE than not wearing one at all', study suggests | Daily Mail Online