The viability of SARS-CoV-2 in the environment will vary and depend on several factors, such as the surface material, humidity, pH, temperature, exposure to UV light, and other conditions. Depending on the environmental factors, coronaviruses on surfaces and objects will naturally die within hours to days.
Coronavirus 229E, a human pathogen, can remain infectious on high-touch environmental surfaces, including wood or stainless steel, for at least 7 days at ambient temperature (~75°F) and in relative humidity conditions (~50%). While research is ongoing, SARS-CoV-2 may also survive outside the host under comparable conditions due to its genetic similarities to 229E. This is why good cleaning and disinfection practices are essential to help limit the spread of COVID-19.
Warmer temperatures and exposure to UV or sunlight will reduce the time the virus can survive on surfaces and objects. Laboratory staff must always remember to follow standard precautions and treat and handle all specimens as infectious.
