Conventional Viruses spread best in cold temperatures. As well as the flu Virus that all of the years back in the Winter of strikes and up to half a Million people and more life costs. In the summer, in warmer temperatures, Virus diseases are likely to be rare. This is because the gel-like shell of the virus melts when heat and dehydration before they can cause damage in people.
In the case of the novel Coronavirus SARS-CoV-2 were scientists, therefore, that hot temperatures would reduce the infections. This is not the case, however, show the extreme Covid-19Numbers in hot regions, such as Brazil, Mexico, India or the southern States of the USA. A study of the Ruhr-University Bochum could now prove even that hot temperatures are cooler, the half-life of the Virus in relation to cold temperatures, even decisive extend.
The Transmission of the Virus from happening in the first place Droplets and Aerosols in our breathing air. Studies indicate that viruses can stay in closed rooms up to 20 minutes in the air. IO reported. A contagion via the so-called Lubrication infection, that is, contaminated surfaces, from closed virologists so far, to a large extent. They assumed that the SARS-CoV-2 Virus could not survive in a warm environment, such as at room temperature, for a long time.
Half-life varies greatly
A research team led by the Junior Professor Stephanie Pfänder has contaminated at the Ruhr-University of Bochum in the laboratory surfaces with the Coronavirus and then at the different temperatures investigated, how the Virus is developed. The scientists found that the half-life of the Virus is different depending on this outer condition significantly. It was 4 degrees Celsius, so at a value that prevails in a refrigerator, at 12.9 hours. At room temperature, it was – as expected – less, and 9.1 hours. In summer 30 degrees, the Virus lived on the longest, namely for 17.9 hours.
The extent to which these results also apply to the development of the pandemic and the expected decline in infections in the summer, in the researchers due to their study results, the Journal of Infection was released, not judge. They have focused solely on the effects of the temperature, they explain. Other ambient conditions such as sunlight, i.e. UV-light, the virus kills known to be, or humidity, were not taken into account. In addition, the contaminated surfaces were all dry.
Virus over several days infectious
Under these laboratory conditions, the reduced Infectivity the virus within the first hour of the 100 times, “but stopped over the next 4 to 8 hours stable, with only a minimal decline at 30 °C and a negative deviation at 4 °C were recorded,” writes pawns. “About 8 hours, we observed over several days of stable, slow decrease in virus titer in all temperatures.”
Surprisingly, it have shown the virus ‘ incubation at 30°C with 17.9 hours of drying, the highest predicted half-time. But: “Overall, our results show that the SARS-CoV-2 infectivity during the initial drying process is greatly reduced; thereafter, the Virus remains in a dried state for several days infectious, regardless of temperature fluctuations.”
However, also other human and environmental conditions could affect – such as viral load, humidity, and solar radiation – which were not taken into account in the study under controlled laboratory conditions, “the surface resistance of SARS-CoV-2, and thus the causality of variations in the seasonal Transmission of SARS-CoV-2 to continue.”
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