COVID-19 Virus Can Survive 28 Days on SurfacesOctober 21, 2020
Commonwealth Scientific and Industrial Research Organization researchers studied the survival rates of infectious SARS-CoV-2 and found that the virus can survive 28 days on surfaces. The results are published in Virology Journal.
The team monitored the survival rates of infectious SARS-CoV-2, dried in an artificial mucous solution, on six common surfaces (stainless steel, glass, vinyl, paper and polymer banknotes, and cotton cloth) and at three different temperatures, 20oC, 30oC, and 40oC, with the relative humidity at 50%. A droplet of fluid with the virus was dried on multiple small test surfaces and left for up to 28 days.
The study showed the following results:
- At 20°C, the virus was tremendously vigorous. Infectious material was still present even after 28 days on smooth surfaces such as stainless steel, glass, vinyl, and banknotes.
- The length of time the infectious virus was able to survive on the porous material (cotton cloth) was much shorter.
- The virus was inactivated much faster in higher temperatures, especially at 40oC.
- The infectious dose of SARS-CoV-2 is estimated to be ~300 particles (more studies needed to conclude). The sample used in the study does not have enough viable virus to infect a person.
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