Needle gauge changes with medical application: When you donate blood, it usually comes out through a 16-gauge (bigger) needle when you inject insulin, it might go in through a roughly 30-gauge (smaller) one. In short, a 25-gauge needle is about half a millimeter across, with an internal diameter of about one-quarter millimeter. A needle’s standard gauge measurement (originally its Birmingham wire gauge) describes its diameter-and like most imperial measurements, it makes no sense whatsoever. * The needle was narrow, I would estimate a 25 gauge. This prevents needlestick injuries in nurses who have to use these syringes hundreds of times a day. The Monoject is easily recognized by the orange plastic housing into which its needle snaps after a single use. * The syringes were Monojects-a model manufactured by Cardinal Health, an enormous multinational company. This was done fairly haphazardly, on an as-needed basis. I saw nurses filling the syringes, other nurses taking trays of the prefilled syringes to tables, and the syringes being used. * I’d watched empty syringes being filled-visibly, in front of everyone-from multiuse vials. Thinking about how body-mounted devices work takes up basically my whole day, and one of my favorite mental exercises is seeing if I can pry practical insights from the wild and irresponsible conceptions of the smooth-brained garbage-people on the internet. I’ve spent the past 15 years sticking tech on people, and in people. It’s true, I am the chief scientific officer of a data company that makes wearable devices. You know that microchipping someone is possible. James! You design wearable devices for a living. What if they microchipped you? You know, Bill Gates, with the 5Gs and the Wi-Fis? James, said the pestilential voice inside my head, while I was scrolling on my phone. The waiting period, of course, was when it happened. The whole experience was tremendously routine: I showed my registration, stood in a waiting area, saw a nurse, got the jab, waited 15 minutes in case of an adverse reaction, and left. I got my first COVID-19 vaccine recently.
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