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#1
posted to rec.boats
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Masks
Study: Masks Fail to Filter Virus in Coughing COVID-19 Patients
A small study from South Korea cast doubt on the ability of surgical or cotton face masks to effectively prevent dissemination of COVID-19 corona virus from the coughs of infected patients. Median viral loads did not differ significantly when comparing coughing samples of COVID-19 patients without a mask, with a surgical mask, and with a cloth mask, suggesting these masks were ineffective at filtering SARS-CoV-2, the virus that causes COVID-19, reported Sung-Han Kim, MD, of University of Ulsan College of Medicine in Seoul, South Korea, and colleagues. In a letter published in Annals of Internal Medicine, they cited the size of viral particles as a possible reason for masks' poor ability to filter the virus, despite their effectiveness against other respiratory infections. In particular, prior studies found surgical masks, as well as N95 respirators (which were not tested in the current analysis), help prevent dissemination of influenza virus. more... https://www.medpagetoday.com/infecti.../covid19/85814 |
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#3
posted to rec.boats
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Masks
On 5/2/2020 3:50 PM, John wrote:
On Sat, 02 May 2020 14:56:54 -0400, wrote: Study: Masks Fail to Filter Virus in Coughing COVID-19 Patients A small study from South Korea cast doubt on the ability of surgical or cotton face masks to effectively prevent dissemination of COVID-19 corona virus from the coughs of infected patients. Median viral loads did not differ significantly when comparing coughing samples of COVID-19 patients without a mask, with a surgical mask, and with a cloth mask, suggesting these masks were ineffective at filtering SARS-CoV-2, the virus that causes COVID-19, reported Sung-Han Kim, MD, of University of Ulsan College of Medicine in Seoul, South Korea, and colleagues. In a letter published in Annals of Internal Medicine, they cited the size of viral particles as a possible reason for masks' poor ability to filter the virus, despite their effectiveness against other respiratory infections. In particular, prior studies found surgical masks, as well as N95 respirators (which were not tested in the current analysis), help prevent dissemination of influenza virus. more... https://www.medpagetoday.com/infecti.../covid19/85814 It's great to see you trust a "small study from South Korea" but not American universities or the CDC. Also, "Nasopharyngeal and saliva samples had a median viral load of 5.66 log copies/mL and 4.00 log copies/mL, respectively. However, median viral loads for patients without a mask, with a surgical mask, and with a cotton mask were 2.56 log copies/mL, 2.42 log copies/mL, and 1.85 log copies/mL, respectively." 1.85 log copies/mL (cotton mask) is a hell of a lot less than 2.56 log copies/mL (without a mask). I suppose the term 'ineffective' should be defined. Lastly, "The researchers acknowledged that the study didn't examine actual transmission of COVID-19 illness nor whether the masks "shorten the travel distance of droplets during coughing." The latter is what was demonstrated in Luddite's simulation (from an American university). I don't think Greg's mind is going to be changed regardless of the data, formal studies or science. So, I give up. :-) I'll wear a mask when in a store or if in a group of people. To me, it's just common sense. -- This email has been checked for viruses by AVG. https://www.avg.com |
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#4
posted to rec.boats
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Masks
On Sat, 2 May 2020 16:35:46 -0400, "Mr. Luddite"
wrote: On 5/2/2020 3:50 PM, John wrote: On Sat, 02 May 2020 14:56:54 -0400, wrote: Study: Masks Fail to Filter Virus in Coughing COVID-19 Patients A small study from South Korea cast doubt on the ability of surgical or cotton face masks to effectively prevent dissemination of COVID-19 corona virus from the coughs of infected patients. Median viral loads did not differ significantly when comparing coughing samples of COVID-19 patients without a mask, with a surgical mask, and with a cloth mask, suggesting these masks were ineffective at filtering SARS-CoV-2, the virus that causes COVID-19, reported Sung-Han Kim, MD, of University of Ulsan College of Medicine in Seoul, South Korea, and colleagues. In a letter published in Annals of Internal Medicine, they cited the size of viral particles as a possible reason for masks' poor ability to filter the virus, despite their effectiveness against other respiratory infections. In particular, prior studies found surgical masks, as well as N95 respirators (which were not tested in the current analysis), help prevent dissemination of influenza virus. more... https://www.medpagetoday.com/infecti.../covid19/85814 It's great to see you trust a "small study from South Korea" but not American universities or the CDC. Also, "Nasopharyngeal and saliva samples had a median viral load of 5.66 log copies/mL and 4.00 log copies/mL, respectively. However, median viral loads for patients without a mask, with a surgical mask, and with a cotton mask were 2.56 log copies/mL, 2.42 log copies/mL, and 1.85 log copies/mL, respectively." 1.85 log copies/mL (cotton mask) is a hell of a lot less than 2.56 log copies/mL (without a mask). I suppose the term 'ineffective' should be defined. Lastly, "The researchers acknowledged that the study didn't examine actual transmission of COVID-19 illness nor whether the masks "shorten the travel distance of droplets during coughing." The latter is what was demonstrated in Luddite's simulation (from an American university). I don't think Greg's mind is going to be changed regardless of the data, formal studies or science. So, I give up. :-) I'll wear a mask when in a store or if in a group of people. To me, it's just common sense. I bet we see more studies like this once they decide it isn't political suicide to do it. I think a lot of the stuff we are doing will be debunked or simply be declared unconstitutional in court before this is over. There is nothing in the Bill of Rights that says "unless the government decides not to". We are treating this as a war on Covid I said before, wars make horrible legislation and in this case, executive orders, not even legislation. “Those who would give up essential liberty to purchase a little temporary safety, deserve neither liberty nor safety.” Benjamin Franklin |
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