Locked Re: [ap-ug] To mask or not to mask, that is the question
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thefamily90 Phillips
I wear a mask when out in public or when dealing with patients in the Dermatopathology office down the hall. As a dermatopathologist I read skin margins for excision of cancers while the patient is in the office. I have to have
contact with the physician and often go into the dermatology office during the procedure. I wear a mask then. I don’t really know whether it is doing anyone any good or not, but I know if I don’t wear one I will make others nervous and there is no need to
do that.
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From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of uncarollo2 <chris1011@...> via groups.io <chris1011@...>
Sent: Saturday, August 1, 2020 8:01:27 PM To: rdcrisp@... <rdcrisp@...>; main@ap-ug.groups.io <main@ap-ug.groups.io>; robert-wynne@... <robert-wynne@...>; main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] [ap-ug] To mask or not to mask, that is the question It takes a while to get used to it. Just like it took a year to begin wearing seatbelts back in 1960. But now it's automatic. I don't even think about seatbelts, they just seem to attach themselves.
Rolando
 -----Original Message-----
From: Richard Crisp <rdcrisp@...> To: main@ap-ug.groups.io; robert-wynne@...; main@ap-gto.groups.io Sent: Sat, Aug 1, 2020 6:11 pm Subject: Re: [ap-ug] To mask or not to mask, that is the question I figure there are three scenarios of interest re: masks
I figure 1 is about like expecting chicken wire to keep mosquitoes out
#2 is reasonable and a kind thing to do for your fellow man (this is S.O.P. in Japan for decades btw) and #3 is a dead on BULLSEYE for me
It’s a constant battle for me to try to remember to keep my hands away from my face/eyes.
Not sure about you, but it’s hard for me to break habits that are going on their 7th decade!
From: main@ap-ug.groups.io <main@ap-ug.groups.io>
On Behalf Of Roland Christen via groups.io
Sent: Saturday, August 1, 2020 3:31 PM To: robert-wynne@...; main@ap-ug.groups.io; chris1011@...; main@ap-gto.groups.io Subject: Re: [ap-ug] To mask or not to mask, that is the question Yes, maybe a fine point.
I wear one not for my own protection because breathing in doesn't prevent my getting a lung full of critters. My mask is for the protection of other people
so that my phlegm and snot doesn't spray into the air when i sneeze or cough.
Our company was shot down for 2 months because of governor's orders, but now we are all working again. None of our crew has caught the virus, all of us
wear our masks here at work when we have to interact or are within 10 ft of each other. Our small operation cannot survive if we get sick, so the mask is a small inconvenience.
Just heard the governor may shut our state down again because of a surge of rising cases. Hope not because right now we are going gang busters and want
to produce and ship product. Our competitors overseas have no restrictions now and are eager to put US companies out of business. Is that enough reason to don a mask in public? I hope so.
Rolando
-----Original Message-----
From: ROBERT WYNNE <robert-wynne@...> To: main@ap-ug.groups.io; Roland Christen via groups.io <chris1011@...>; main@ap-gto.groups.io <main@ap-gto.groups.io> Sent: Sat, Aug 1, 2020 5:15 pm Subject: Re: [ap-ug] To mask or not to mask, that is the question Maybe this is putting too fine a point on topic without any humor; but from
N95
masks are designed to remove more than 95% of all particles that are at least 0.3 microns (µm) in diameter. In fact, measurements of the particle filtration efficiency of N95 masks show that they are capable of filtering ≈99.8% of particles with a diameter
of ≈0.1 μm (Rengasamy
et al., 2017). SARS-CoV-2 is an enveloped virus ≈0.1 μm in diameter, so N95 masks are capable of filtering most free virions, but they do more than that. How so? Viruses are often transmitted through respiratory droplets produced by coughing and sneezing.
Respiratory droplets are usually divided into two size bins, large droplets (>5 μm in diameter) that fall rapidly to the ground and are thus transmitted only over short distances, and small droplets (≤5 μm in diameter). Small droplets can evaporate into 'droplet
nuclei', remain suspended in air for significant periods of time and could be inhaled. Some viruses, such as measles, can be transmitted by droplet nuclei (Tellier
et al., 2019). Larger droplets are also known to transmit viruses, usually by settling onto surfaces that are touched and transported by hands onto mucosal membranes such as the eyes, nose and mouth (CDC,
2020). The characteristic diameter of large droplets produced by sneezing is ~100 μm (Han
et al., 2013), while the diameter of droplet nuclei produced by coughing is on the order of ~1 μm (Yang
et al., 2007). At present, it is unclear whether surfaces or air are the dominant mode of SARS-CoV-2 transmission, but N95 masks should provide some protection against both (Jefferson
et al., 2009; Leung
et al., 2020).
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