How long can COVID-19 survive on surfaces?
A recent study published in The New England Journal of Medicine found that the SARS-CoV-2 virus, responsible for COVID-19, can survive on surfaces such as plastic and stainless steel for up to three days. On copper surfaces, it can persist for up to four hours, while on cardboard, its lifespan is limited to approximately 24 hours. However, keep in mind that these figures represent the maximum survival time and the virus may lose viability earlier under certain conditions.
What factors can influence virus persistence on surfaces?
Several factors can impact how long the virus remains viable on different surfaces:
- Surface type: Porous surfaces like cardboard may trap and remove viral particles faster than non-porous surfaces like plastic.
- Humidity and temperature: Viruses tend to survive longer under low humidity and cool temperatures, compared to high humidity and warm conditions.
- Ultraviolet (UV) light: UV radiation from sunlight or specialized equipment can quickly degrade the virus, reducing its viability.
- Level of viral contamination: A high viral load initially deposited on a surface may extend its survival time.
How can we protect ourselves from surface transmission?
To minimize the risk of infection through surface transmission, it’s crucial to follow these preventive measures:
- Frequent hand hygiene: Wash your hands thoroughly with soap and water for at least 20 seconds, especially after touching surfaces that might be contaminated.
- Use of appropriate disinfectants: Regularly clean commonly touched surfaces such as doorknobs, light switches, and countertops with an EPA-approved disinfectant to eliminate the virus.
- Avoid touching your face: Refrain from touching your eyes, nose, and mouth to prevent the transfer of the virus from contaminated surfaces to vulnerable body parts.
- Wear gloves when necessary: Use disposable gloves when cleaning or handling potentially contaminated objects and dispose of them properly after use.
While the SARS-CoV-2 virus can persist on surfaces for certain durations, it’s important to remember that transmission primarily occurs through respiratory droplets. However, being cautious about surface transmission can provide an extra layer of protection. By understanding the factors influencing virus persistence and adhering to proper hygiene practices, we can help minimize the spread of COVID-19 in our communities.
Stay informed, stay safe!