![]() So unless the surface is literally wet and saturated for 10 minutes, it is still contaminated! Do not use benzalkonium chloride or chlorhexidine, (the main ingredients in disinfectant or disinfectant wipes) unless they have concentrations of at least 0.1% and they will be hard to come by at this stage now anyway! It’s funny (in a morbid way) everyone who panic bought disinfectant wipes have no idea that these products do not kill the virus- they are in fact wasting their time! This is because most disinfectant wipes are only 0.04% benzalkonium chloride, or 0.02% chlorhexidine, so in fact, it can take up to 10 minutes to kill it when used on surfaces. I’m only going to say this once, do not use the following. It is really important to make sure the alcohol doesn’t evaporate before the time it takes to inactivate the virus, this means you really need to wet/saturate the surface, so don’t forget! What you shouldn’t use Therefore the study indicates that you should use these products to wipe down surfaces, making sure to saturate the surface, so it doesn’t evaporate too quickly. Thus this is where good old ‘metho’, for us Aussies saves the day. Unfortunately, the commercially bought product Isocol is only 64%, so it’s also ineffective for this time frame, but see the tables below to see other time frames to use on less frequented surfaces of the home. The review by Kampf and Steinmann (2020) indicate, both isopropyl alcohol and ethanol (methylated spirits) with a concentration that is >70% (greater than) will inactivate the virus in 30 seconds. To inactivate the virus on surfaces in the shortest and therefore most effective time frame possible, you need pure rubbing alcohol, 95% ethanol (which is simply methylated spirits) or failing that at least 71% or higher isopropyl alcohol (which Aussies can buy at Bunnings or hardware stores). I am writing this guide in response to an in-depth review paper recently published by Kampf and Steinmann (2020), which demonstrates what surface disinfections are likely to inactivate SARs-CoV-2 using model pathogens that are most like SARs-CoV-2 and therefore more than likely can be used to prevent the spread of CoVid-19 (see table 1 below or table 2 of the article). The following information you are being provided with is correct for its time and is the best information available to scientists at this time).ĭisinfecting surfaces to prevent the spread of CoVid-19 What you should use ![]() I am also highly skilled at both conducting a search of, as well as interpreting peer-review scientific literature, particularly literature in the biosciences and biomedical sciences, including virology. ![]() I have extensive knowledge of infection dynamics and pathogen control, especially parasites both botanical and blood. (*Please note, I am not a doctor, nor am I a medical professional but I am a scientist (published in peer review) I have a B.Env.Sci (Hons) and I am currently seeking supervisor for a PhD that focuses on zoonotic risk factors of human malaria. At the end of this article, there is also a recipe for homemade hand sanitiser with a final concentration of 83.12% alcohol. Image from (Photo credit: Jummie /Getty Images /iStockphoto)įirst off, there are plenty of other useful sources out there that explain the importance of washing your hands and how to wash your hands correctly, so this paper will not cover this but please wash your hands correctly, for 20 seconds and often! Instead, this paper will cover other aspects of managing the spread of SARs-CoV-2, that I personally believe are the most effective ways to combat the spread of CoVid-19*.
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