“液体口罩”火了！能阻隔99.9%的病毒？医生提醒

Core Viewpoint - The "liquid mask" nasal spray is gaining popularity as a product that claims to block viruses and bacteria, especially during the winter season when respiratory infections are prevalent. However, its effectiveness and safety are under scrutiny, with experts questioning its claims and potential health risks [1][3][5]. Group 1: Product Description and Market Performance - The "liquid mask" is marketed as a nasal spray that forms a physical barrier in the nasal cavity to isolate pathogens and allergens, with some products reportedly selling over 1 million bottles annually [1][3]. - The product claims to have a "99.9% blocking rate" against viruses, which is considered exaggerated and potentially misleading [8]. Group 2: Effectiveness and Scientific Validation - Experts express skepticism about the effectiveness of the "liquid mask," noting that it has not undergone clinical validation, and its protective effects are only supported by laboratory data, which may not reflect real-world 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 [6]. Group 3: Comparison with Traditional Masks - The "liquid mask" is not a substitute for traditional masks, particularly medical surgical masks, which have established technical standards for blocking respiratory pathogens [8]. - Traditional masks provide a clear physical barrier, while the "liquid mask" lacks the rigorous testing and classification as a medical device, raising concerns about its safety and efficacy [8]. Group 4: Health Concerns and Long-term Use - Long-term use of the "liquid mask" may pose health risks, especially for individuals with allergies, as they may react negatively to the ingredients in the spray [9]. - There is a lack of systematic evaluation regarding the residual components of the spray and their potential impact on nasal mucosa health and the effectiveness of other nasal medications [9]. Group 5: Recommendations for Public Health - During the winter season, it is advised to wear proper masks, such as medical surgical masks or N95 masks, to effectively reduce the risk of virus transmission [10][11]. - Public health measures should include vaccination, proper mask usage, hand hygiene, and ventilation to combat respiratory infections [11].