I agree with you on the last statement.Schootopia wrote: ↑Fri May 22, 2020 6:18 amFrom OKY's comments-
.. the face shield is part of PPE because studies show that even a N95 is unable to fully deflect a direct sneeze.They can wear either a face mask or a face shield when in school or on campus. This is for their own protection and that of others. Schools will be arranging to distribute face shields to all preschool and primary school students in Term 3. Teachers will help the young children get used to the masks or shields with time. If there are special circumstances, teachers will also exercise flexibility.
If u use a face shield only, you need to be comfy with your own exposure.
Initially I thought it was great that MOE allow the choice of either a face shield or face mask. Wearing a face shield is more comfy for the kids since they will be in school for long hours.
Face shield has more pros than cons compared to face mask BUT, there is ONE critical disadvantage about face shield, that is, one will breathe in (aerosol) Covid-19 particles through the wide openings of the face shield. Note that 40 students sitting near one another in an enclosed classroom for more than 6 hours a day! We can have 1001 good points about face shield but this 1 point is the fatal shortcoming.
Surgical mask can block off 95% of germs including covid-19 virus. That’s why face shield plus face mask always go in pair, sort of complement each other. Not sure why we wear only either 1.
Low risk environment like after 8 weeks of CB, I think it is fine. When we reopen our economy to the outside world, is face shield alone enough? Peak hour squeeze MRT, think better to put on face mask lah.