This reply
Lin mark this message contains personal perspective
originally written by Lin
原文應該是說,雙層口罩只是選項之一,密合戴好、並定時更換才是好的。(CDC和國內專家也支持單層密合的戴法)

Opinion Sources

https://www.facebook.com/photo?fbid=10226208797347765&set=a.1437317854332

The content above by Cofacts message reporting chatbot and crowd-sourced fact-checking community is licensed under Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0), the community name and the provenance link for each item shall be fully cited for further reproduction or redistribution.