Perform hand hygiene frequently. Wash your hands often with soap and water for at least 20 seconds or use an alcohol-based hand sanitizer that contains 60 to 95% alcohol, covering all surfaces of your hands and rubbing them together until they feel dry. Soap and water should be used preferentially if hands are visibly dirty.
有一瓶酒精， 没有打开过，有4 年或5年了吧， 瓶子上没有过期日。 请问还有效吗？ 能用吗？
还有，70% 的酒精消毒有效吗？ 看好多信息说要75%的才能杀死新冠病毒， 但是买不到货。 谢谢！
以前讨论过
https://bbs.wenxuecity.com/health/893504.html
最好参照CDC推荐的家庭消毒方法。比较严格，确保安全
https://www.cdc.gov/coronavirus/2019-ncov/prepare/cleaning-disinfection.html
https://www.cdc.gov/coronavirus/2019-ncov/hcp/guidance-prevent-spread.html
Perform hand hygiene frequently. Wash your hands often with soap and water for at least 20 seconds or use an alcohol-based hand sanitizer that contains 60 to 95% alcohol, covering all surfaces of your hands and rubbing them together until they feel dry. Soap and water should be used preferentially if hands are visibly dirty.这个也是专业的：https://www.compoundchem.com/2020/03/04/hand-sanitisers/
医用酒精70%是因为这是针对细菌的最佳浓度。浓度过高，甚至纯酒精，会使细菌表面蛋白变性，形成一层硬而致密的保护膜，反而保护了细菌细胞壁里面的结构。这样就不能杀死细菌。但是对于病毒来说，只要使表面蛋白变性，病毒就不能结合ACE2受体，就无法侵入人体细胞。所以纯酒精杀灭病毒应该是最快最彻底。
我来上次截图。
你说的是汽油吧
他们根本没有测试纯酒精。
我们人体皮肤和唾液中就有大量RNA酶。