For vaccines it's mostly about how the immune system responds, it doesn't depend much on height or weight (except maybe in obese people because of effects the obesity might have on the immune system).Anne Gracie wrote: ↑23 Jan 2022, 05:37 As the booster is also a full adult dose, why don’t they weigh people? As far as I know I have had the same dose as a 6 + foot male, and I am a petite 5’3” female, so in effect I got more. That doesn’t make sense.
Source“Vaccines work differently [than medications] because it’s not about having a certain level of it in your blood, it’s about stimulating the immune system, and most people’s immune system’s will react to a very small amount of whatever it is that they’re being exposed to,” Dr. Amesh Adalja, a senior scholar with the Johns Hopkins Center for Health Security, told McClatchy News.
But I think they are researching if a lower dose will do for the booster. In Moderna's vaccine it's already 50µg instead of 100µg.