![half life 1 completo half life 1 completo](https://i0.wp.com/freepcgamesden.com/wp-content/uploads/2013/05/Half-Life-1-ScreenShot-2.jpg)
The transmission of SARS-CoV-2 appears to be primarily via aerosols and recent studies have shown that SARS-CoV-2 is able to remain infectious in airborne particles for greater than 3 h. The World Health Organization (WHO) declared SARS-CoV-2 a pandemic on 11th March 2020 and as at the 7th August 2020, there have been over 18.8 million confirmed cases with more than 708,000 reported deaths from SARS-CoV-2. These results could be used to inform improved risk mitigation procedures to prevent the fomite spread of COVID-19. These findings demonstrate SARS-CoV-2 can remain infectious for significantly longer time periods than generally considered possible. Conversely, infectious virus survived less than 24 h at 40 ☌ on some surfaces. With initial viral loads broadly equivalent to the highest titres excreted by infectious patients, viable virus was isolated for up to 28 days at 20 ☌ from common surfaces such as glass, stainless steel and both paper and polymer banknotes. We obtained half lives of between 1.7 and 2.7 days at 20 ☌, reducing to a few hours when temperature was elevated to 40 ☌. Survival rates of SARS-CoV-2 were determined at different temperatures and D-values, Z-values and half-life were calculated. Inoculated surfaces were incubated at 20 ☌, 30 ☌ and 40 ☌ and sampled at various time points. All experiments were carried out in the dark, to negate any effects of UV light. This study measured the survival rates of infectious SARS-CoV-2, suspended in a standard ASTM E2197 matrix, on several common surface types. While the role of fomite transmission is not yet fully understood, precise data on the environmental stability of SARS-CoV-2 is required to determine the risks of fomite transmission from contaminated surfaces. The rate at which COVID-19 has spread throughout the globe has been alarming.