Hacker News new | ask | show | jobs
by notacoward 2287 days ago
You're exhibiting exactly the kind of non-science-based attitude I was talking about. Droplets, oh no, run away!

Let's say you're unknowingly infected, like all of those people who were hanging out at bars as though they're invulnerable this weekend. So you have virus on your skin already. Are you more likely to pass it on to others via surfaces if your skin is bare or if you put a glove on it? The answer's pretty obvious. If you touch your face then the probability of infection either way increases again, but (a) people touch their faces less often with gloves on and (b) every time you change gloves the probability drops back to near zero. So yes, gloves do protect you somewhat, and they protect others even more. Just as importantly, there's no sane scenario in which they'd make things worse or deny resources to those who need them more (as with masks). It doesn't make much difference whether the surface transmission route is directly on skin or via face touching. That's why health care professionals use gloves even when dealing with respiratory diseases like COVID-19.

2 comments

> people touch their faces less often with gloves on

Is that true? I would assume people usually touch their faces because something itches or to adjust glasses/hair/a mask. I would expect gloves to have a minimal impact on this compared to just paying attention to never touching your face. I am open to seeing numbers on this, but don't know where to look for any.

> every time you change gloves the probability drops back to near zero

I think that's only true if you handle the gloves somewhat carefully (not that it's hard to do, but you do have to pay some attention). But washing your hands or using hand sanitizer also achieves the same. So the question comes back to "how often do people wash their hands/use hand sanitizer compared to how often they change gloves?", which is an empirical question I have no clear intuition for, but do expect for differences to not be that large.

> That's why health care professionals use gloves even when dealing with respiratory diseases like COVID-19.

I think healhcare professionals wear gloves for a number of reasons, chiefly because, if you're used to it, you can be more efficient when changing gloves than when washing your hands: medical professionals normally put on a new pair of gloves before touching you, then throw those away after they are done. Most people are not used to it, they do not constantly change gloves, and do not have to deal with moving from patient to patient. So just as I don't think it's useful to tell people to wear surgical overalls and change them every hour, I don't think we can tell them to use gloves the way they are used in a hospital.

Simple thought experiment: you're about to be in a situation where, despite any efforts to the contrary, you expect to be in contact with a hundred other people. It's not that uncommon e.g. in retail. Would you prefer that to be skin to skin, or glove to glove? Would you literally bet your own life and others' on that "entirely useless" claim, or would you take that cheap and basic precaution?
I would definitely prefer free hands IF I also have access to hand sanitizer. I would be much more confident that I have successfully covered my entire hand in sanitizer than if I were to sanitize gloved hands.

I would admit that I would probably feel safer with a mask on though, despite the problems with wearing masks as well.

So you're going to use hand sanitizer a hundred times, on average every five minutes? Color me skeptical.
Maybe, maybe not, but I definitely wouldn't change gloves every five minutes. Squirting some hand sanitizer after every client in retail doesn't seem as onerous. And definitely if my nose itches, I would rather squirt some hand sanitizer, clean my hands, and scratch it; rather than take off my gloves, scratch my nose, than put on new gloves.
If you were wearing gloves you wouldn't need to change every five minutes. Alcohol-sanitizer fixation is not the route to public health.
> The answer's pretty obvious.

It's not particularly obvious to me how gloves are all that different to hand-washing.

In both cases, your hands are disease-free until you touch something that isn't disease-free.

> It's not particularly obvious to me how gloves are all that different to hand-washing.

Only in the sense that hand-washing is more effective. In fact, most recommendations to use gloves also recommend hand-washing immediately after removal. However, it's not practical to wash hands every few minutes, literally hundreds of times a day. Gloves can provide protection between less frequent washings.