Do hand sanitizers work against viruses? This is a question that has been on the minds of many people, especially during the COVID-19 pandemic. With the increased awareness of hand hygiene, the use of hand sanitizers has become more prevalent. However, there is still some confusion about their effectiveness against viruses. In this article, we will explore the science behind hand sanitizers and their efficacy against viruses.
Hand sanitizers are alcohol-based solutions that are designed to kill germs on the skin. They contain a high concentration of alcohol, typically between 60% and 95%, which is the active ingredient that kills the viruses and bacteria. The alcohol works by denaturing the proteins and lipids in the cell membranes of the microorganisms, leading to their destruction.
When it comes to viruses, hand sanitizers are particularly effective against enveloped viruses, such as the flu and COVID-19. These viruses have a lipid envelope that is vulnerable to the alcohol’s action. However, they may not be as effective against non-enveloped viruses, such as norovirus, which is resistant to alcohol-based sanitizers. It is important to note that hand sanitizers are not a substitute for handwashing with soap and water, especially when hands are visibly dirty or contaminated.
The World Health Organization (WHO) recommends using hand sanitizers when soap and water are not available. They suggest that hand sanitizers should be applied to the palm of one hand, then rubbed together until the hands are dry. It is important to cover all surfaces of the hands, including the backs of the hands, between the fingers, and under the nails. The Centers for Disease Control and Prevention (CDC) also supports the use of hand sanitizers in situations where handwashing is not feasible.
While hand sanitizers are effective against many viruses, they are not foolproof. Some viruses, such as norovirus, can survive on surfaces for extended periods and may not be killed by hand sanitizers. Additionally, hand sanitizers may not be as effective if the hands are not thoroughly cleaned before application. It is essential to use hand sanitizers as part of a comprehensive hand hygiene strategy that includes regular handwashing with soap and water.
In conclusion, hand sanitizers can be effective against viruses, particularly enveloped ones. However, they are not a replacement for handwashing with soap and water. It is important to use hand sanitizers correctly and in conjunction with other hand hygiene practices to ensure the best protection against viruses. As the COVID-19 pandemic continues, the use of hand sanitizers will remain an important tool in preventing the spread of infectious diseases.
