Stability of SARS-CoV2 and other coronaviruses in the environment and on common touch surfaces and the influence of climatic conditions: a review
Hamada A. Aboubakr, Tamer A. Sharafeldin, Sagar M. Goyal
Abstract
Although the unprecedented efforts the world has been taking to control the spread of the humancoronavirus disease (COVID-19) and its causative etiology [Severe Acute Respiratory Syndrome-Coronavirus-2 (SARS-CoV-2)], the number of confirmed cases has been increasing drastically.Therefore, there is an urgent need for devising more efficient preventive measures, to limit the spreadof the infection until an effective treatment or vaccine is available. The preventive measures dependmainly on the understanding of the transmission routes of this virus, its environmental stability, andits persistence on common touch surfaces. Due to the very limited knowledge about SARS-CoV-2,we can speculate its stability in the light of previous studies conducted on other human and animalcoronaviruses. In this review, we present the available data on the stability of coronaviruses (CoVs),including SARS-CoV-2, from previous reports to help understand its environmental survival.According to available data, possible airborne transmission of SARS-CoV-2 has been suggested.SARS-CoV-2 and other human and animal CoVs have remarkably short persistence on copper, latex,and surfaces with low porosity as compared to other surfaces like stainless steel, plastics, glass, andhighly porous fabrics. It has also been reported that SARS-CoV-2 is associated with diarrhea and thatit is shed in the feces of COVID-19 patients. Some CoVs show persistence in human excrement,sewage, and waters for a few days. These findings suggest a possible risk of fecal-oral, foodborne,and waterborne transmission of SARS-CoV-2 in developing countries that often use sewage-pollutedwaters in irrigation and have poor water treatment systems. CoVs survive longer in the environment atlower temperatures and lower relative humidity. It has been suggested that large numbers of COVID-19 cases are associated with cold and dry climates in temperate regions of the world and thatseasonality of the virus spread is suspected.