The CDC has recently updated its guidance, indicating that excessive disinfecting of surfaces is generally unnecessary for reducing the risk of COVID-19 transmission. If you’re still haunted by the early pandemic days of wiping down groceries and sanitizing every inch of your home, you can now relax a bit. According to the Centers for Disease Control and Prevention (CDC), the risk of contracting the virus through surfaces is quite low, especially if you’re not in contact with someone who is confirmed or suspected to have COVID-19.
CDC officials have stated that surface transmission is a minor concern, with Vincent Harper, the director of the Environmental Health Division, emphasizing that it is “secondary to the primary routes of virus transmission via respiratory droplets and aerosols.” While this doesn’t mean you should disregard hygiene altogether, most household surfaces can be adequately maintained with standard cleaning practices. Harper pointed out that while hard, indoor surfaces pose a slightly higher risk, the virus tends to die quickly on porous materials and is significantly affected by sunlight when outdoors.
It’s important to note that the highest risk of surface transmission occurs within the first 24 hours after someone has been infected, which is often before they even realize they have the virus. In homes where a person has tested positive, the CDC recommends cleaning and disinfecting surfaces to help prevent the spread to others. However, for those uncertain about exposure, focusing on disinfecting frequently-touched areas like doorknobs and light switches is still a good idea. Nevertheless, these disinfecting efforts should complement other established safety measures such as maintaining physical distance from others, wearing masks, and practicing frequent hand hygiene.
“In most cases, using soap or detergent for cleaning is sufficient to lower the already minimal risk of surface transmission,” said Harper. “Disinfecting surfaces is typically not necessary unless someone who is sick or has tested positive for COVID-19 has been in the home within the past 24 hours.”
Harper also cautioned against what he termed “hygiene theater,” where superficial cleaning may give a false sense of security if it replaces more effective prevention strategies. Additionally, it’s critical to use cleaning products safely—never ingest or apply them to your skin as this can be harmful.
In summary, stick to proper cleaning methods, avoid mixing chemicals like bleach and ammonia, and ensure everyone in your household is informed about safe practices.
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