How to apply foam strips to masks quickly and efficiently

       Over the past two years the pandemic has come and gone in waves, and people in China have long since built good habits: wearing a mask when going out, washing hands promptly after getting home, and actively answering the national call to get vaccinated.        For everyday errands a standard disposable medical mask (Figure 1) is enough, while medical staff working in high-risk settings need medical protective masks, that is, N95 masks (Figure 2).

                          

  Figure 1: Disposable medical mask                                                    Figure 2: N95 mask