“液体口罩”能防流感？ 医生：涉嫌虚假宣传

Core Viewpoint - The "liquid mask" nasal spray is gaining popularity in the market, especially during the winter respiratory disease season, with annual sales exceeding 1 million bottles. However, its effectiveness and safety are under scrutiny, as it lacks clinical validation and may not replace traditional masks [2][3][4]. Product Description and Claims - The "liquid mask" claims to create a physical barrier in the nasal cavity to block viruses and bacteria, with a stated effectiveness of 99.9% [3][6]. - It is primarily marketed as a consumer product rather than a medical device, raising concerns about the accuracy of its claims [6]. Effectiveness Concerns - The product has not undergone clinical trials, and its protective effects are only supported by laboratory data, which may not translate to real-world effectiveness [4]. - The anatomical structure of the nasal cavity makes it difficult for the spray to cover all areas effectively, leaving some mucous membranes exposed to pathogens [5]. Comparison with Traditional Masks - Traditional masks, especially surgical masks, are designed with clear technical standards to physically block respiratory pathogens, while the "liquid mask" lacks such rigorous validation [5][6]. Health Risks of Long-term Use - Prolonged use of the "liquid mask" may pose health risks, particularly for individuals with allergies, as they may react negatively to the ingredients [7]. - There are concerns about the residual components of the spray affecting nasal health and the efficacy of other nasal medications [8]. Alternative Protection Methods - Other popular methods for preventing respiratory infections, such as gargling with salt water or taking vitamin C supplements, have been deemed ineffective or potentially harmful [9][10]. - The most effective preventive measure remains wearing masks, especially in high-risk seasons, along with proper hygiene practices [11][12]. Recommendations for Public Health - During the winter season, it is crucial for the public to be cautious of exaggerated claims and to avoid purchasing unverified products. Vaccination and proper mask-wearing are emphasized as the best strategies for preventing respiratory infections [14].