The implementation effect of the 24-hour Supervise-Correct-Improve (SCI) supervision model was investigated in COVID-19 isolation ward in putting on and taking off process of personal protective equipment. As shown in results, the error rate of taking off process was significantly reduced (P < 0.001) by applying the 24h “SCI” mode. Staffs over 40 years old and workers were more likely to make mistakes. Through uninterrupted supervision and protection, application of this mode is proved to be effective.

Keywordschlorine dioxide (ClO 2 ), nasal irrigation, COVID-19, SARS-CoV-2, respiratory infectious diseases Chlorine dioxide (ClO 2 ) is a high-level disinfectant that is safe and widely used for sterilization. Due to the limitations on preparing a stable solution, direct use of ClO 2 in the human body is limited. Nasal irrigation is an alternative therapy used to treat respiratory infectious diseases. This study briefly summarizes the available evidence regarding the safety/efficacy of directly using ClO 2 on the human body as well as the approach of nasal irrigation to treat COVID-19. Based on the available information, as well as a preliminary experiment that comprehensively evaluated the efficacy and safety of ClO 2 , 25-50 ppm was deemed to be an appropriate concentration of ClO 2 for nasal irrigation to treat COVID-19. This finding requires further verification. Nasal irrigation with ClO 2 can be considered as a potential alternative therapy to treat respiratory infectious diseases, and COVID-19 in particular.

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