D: If you don't wear a mask properly you're also spreading the virus.
F: You learned from the western medical science, I judge by facts and logic.
D: It doesn't make sense. It's airborne. Your mask is not tight. You have to change the mask every few hours which most people don't do. The spread of a lot of viruses is from virus surviving on hard surfaces.
D: If you can breathe with a mask on, you can breathe in the virus. As simple as that.
F: But, it reduces the chance of virus going into your mouth and nose. A medical face mask can filter very tiny particles. Understand?
D: No, oh my god you missed a lot of hygiene knowledge. That's not the only places it enters your body. How do you eat? With your hands. How do you see, with your eyes. Is your mask covering those areas? No.
D: There are many different medical masks, they do not filter virus, Dad, don't forget I work in a hospital. Why are you trying to be an expert in this topic and spread false information. In order to wear a N95 mask properly you need to be mask fitted.
D: In the hospital we are all mask fitted with a personalized size to our face.
D: You are not mask fitted.
D: When it's properly fitted, it's very hard to breathe. You can't wear it for more than an hour because you will not get enough oxygen. That's how tight the mask is. You can't breathe and need to change to new mask.