公大調查:三成四人重用口罩 情況不理想 (in Chinese)
https://www.hkcd.com/content/2020-04/28/content_1190254.html
https://www.hkcd.com/content/2020-04/28/content_1190254.html
https://www1.hkej.com/dailynews/views/article/2448016/調查發現35+港人重用口罩
https://www.am730.com.hk/news/新聞/消毒無用-平均一個用兩日半-三成半港人重用口罩-216763
https://www.hk01.com/社會新聞/465984/口罩肺炎-公大調查-三成半港人重用口罩-平均兩日半才換一個
https://www.thestandard.com.hk/section-news/section/4/218552/Making-a-mask-last-found-to-be-problem
https://orientaldaily.on.cc/cnt/news/20200428/00176_014.html
http://www.takungpao.com.hk/news/232109/2020/0428/442230.html
https://skypost.ulifestyle.com.hk/article/2629377/部分人以蒸燙消毒%20憂買唔到3成半受訪港人重用口罩