Australian researchers from the Commonwealth Scientific and Industrial Research Organization (CSIRO) have found that SARS-CoV-2 can survive up to four weeks on surfaces such as cell phone screens or currency notes.
“With initial viral loads broadly equivalent to the highest titers excreted by infectious patients, viable virus was isolated for up to 28 days at 20 ° C on common surfaces such as glass, stainless steel, and paper and polymer currency notes,” is the conclusion. what scientists arrive at in a CSIRO article published in the Virology Journal.
At the same time, the researchers confirmed that the lifetime of the virus depends on the surface temperature. Thus, at 40 ° C, the same viral load is extinguished on some surfaces in less than 24 hours, the study indicates.
As for the half-life, it is between 1.7 and 2.7 days at 20 ° C and a few hours at 40 ° C.
The head of the CSIRO, Dr. Larry Marshall, emphasized that the results of the study will contribute to contain the pandemic.
“Determining how long the virus is actually viable on surfaces allows us to more accurately predict and mitigate its spread and better protect our people,” Marshall was quoted as saying in a press release from the organization.
For his part, Trevor Drew, director of the Australian Center for Disease Preparedness (ACDP, for its acronym in English), who also participated in the study, indicated that there are many factors on which the survival of Covid-19 depends.
“The time that [las partículas del virus] They can survive and remain infectious depends on the type and amount of virus, the surface area, the environmental conditions and how it is deposited, for example by contact or by droplets emitted by coughing. Proteins and fats in body fluids can also significantly increase virus survival times, ”explained Drew.