That Wired article is fantastic. I see this threshold of 5 microns all over the place and it turns out to be completely false and based on a historical accident. It’s crazy how once a couple authorities define the official knowledge (in this case, the first few scientists and public health bodies to look at Ward’s paper), it can last for generations with zero critical engagement and cause maybe thousands of deaths.
I’m confused about the distinction between fomite and droplet transmission. Is droplet transmission a term reserved for all non-inhalation respiratory pathogen transmission (like touching a droplet on a surface and then touching your face, or the droplet landing on your mouth), so it includes some forms of fomite transmission? I’m seeing conflicting sources and a lot that mention the >5 μm rule so don’t seem too trustworthy.
I’m confused about the distinction between fomite and droplet transmission.
From what I’ve read, fomite transmission must involve surface touching, whereas droplet transmission must involve droplets, which are expelled by coughing or sneezing, directly landing (like a bullet) in your mouth, nose, or eyes without any extra contact or touching.
These methods of transmission seem so implausible (how many people actually sneeze or cough directly in someone’s face?) to be major causes of spread that it’s hard to believe that no one seemed to have performed definitive experiments to test these ideas for many decades. On the other hand, even seemingly definitive experiments (like the rhinovirus study) don’t seem able to shift expert opinion. In the case of rhinovirus, maybe one experient isn’t enough, but then the question is why no one seems to have been interested in replicating it.
That Wired article is fantastic. I see this threshold of 5 microns all over the place and it turns out to be completely false and based on a historical accident. It’s crazy how once a couple authorities define the official knowledge (in this case, the first few scientists and public health bodies to look at Ward’s paper), it can last for generations with zero critical engagement and cause maybe thousands of deaths.
I’m confused about the distinction between fomite and droplet transmission. Is droplet transmission a term reserved for all non-inhalation respiratory pathogen transmission (like touching a droplet on a surface and then touching your face, or the droplet landing on your mouth), so it includes some forms of fomite transmission? I’m seeing conflicting sources and a lot that mention the >5 μm rule so don’t seem too trustworthy.
Don’t you mean millions of deaths?
From what I’ve read, fomite transmission must involve surface touching, whereas droplet transmission must involve droplets, which are expelled by coughing or sneezing, directly landing (like a bullet) in your mouth, nose, or eyes without any extra contact or touching.
These methods of transmission seem so implausible (how many people actually sneeze or cough directly in someone’s face?) to be major causes of spread that it’s hard to believe that no one seemed to have performed definitive experiments to test these ideas for many decades. On the other hand, even seemingly definitive experiments (like the rhinovirus study) don’t seem able to shift expert opinion. In the case of rhinovirus, maybe one experient isn’t enough, but then the question is why no one seems to have been interested in replicating it.