| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| BostonFern | "On the net, I've seen studies about using different material to filter air. Based on my impression, cotton is not an effective media to filter v..." | Read more » | about 4 years ago | |||
| BostonFern | "I have a few scientific paper to share with you. This paper says that salt can be used to inactivate virus on surgical mask. https://www.nature.co..." | Read more » | about 4 years ago |