喷一喷就能防流感？“液体口罩”走红，医生却提醒……

Core Viewpoint - The "liquid mask" nasal spray is gaining popularity as a protective measure against respiratory viruses, especially during the winter season when respiratory infections are prevalent, but its effectiveness and safety are under scrutiny [1][4][5] Group 1: Product Overview - The "liquid mask" is marketed as a nasal spray that forms a physical barrier in the nasal cavity to block pathogens and allergens, claiming a "99.9% blockage rate" [1][4] - It is primarily sold as a consumer product rather than a medical device, lacking rigorous clinical validation [6][7] Group 2: Effectiveness and Limitations - The effectiveness of the "liquid mask" is questionable, as it has not undergone clinical trials, and its protective capabilities are only supported by laboratory conditions [5][6] - The nasal cavity's complex structure makes it difficult for the spray to cover all areas effectively, leaving some mucous membranes exposed to pathogens [5] - The protective film created by the spray is not durable and can be easily disrupted by normal activities such as nose-picking or sneezing [5][7] Group 3: Comparison with Traditional Masks - Traditional masks, especially surgical masks, are designed with specific technical standards to physically block respiratory pathogens, while the "liquid mask" lacks such standards [6] - The claims of the "liquid mask" being a comfortable alternative to traditional masks are misleading, as they do not provide equivalent protection [6] Group 4: Health Concerns - Long-term use of the "liquid mask" may pose health risks, particularly for individuals with allergies, as they may react negatively to the ingredients [7] - There is no comprehensive assessment of how the residual components of the spray affect nasal mucosa health or the efficacy of other nasal medications [7] Group 5: General Recommendations for Respiratory Protection - During the high season for respiratory infections, traditional preventive measures such as wearing masks, hand hygiene, and vaccination remain the most effective strategies [15][16] - The public is advised to be cautious of exaggerated claims regarding alternative products and to prioritize scientifically validated methods for disease prevention [15][16]