3 ms·

Masks with exhalation valves (edit: and no filter :) are inconsiderate to others since they do not stop you from spreading virus particles. https://www.nist.go

Masks with exhalation valves (edit: and no filter :) are inconsiderate to others since they do not stop you from spreading virus particles. https://www.nist.gov/news-events/news/2020/11/new-airflow-videos-show-why-masks-exhalation-valves-do-not-slow-spread https://www.nist.gov/news-events/news/2020/11/new-airflow-vi...

ripecoconut 6y ago
That's why they put a filter on it
ceejayoz 6y ago
> with a retrofitted exhalation valve filter
- appleflaxen 6y ago
  that definitely fixes it. is there a way to know who has the exhalation filter and who doesn't, though? How does a high-volume retail store know whether the rando with the elastomeric mask has a sufficient exhalation filter or not? That is my big concern.
jjeaff 6y ago
You can't spread what you haven't caught.
- TheRealWatson 6y ago
  Seems like everyone assumes they are not infected. It's always the others that are irresponsibly spreading diseases.