Some medications are normally administered by intramuscular injection, the preferred site being the upper arm.
But for some humans, there is a problem; the medic involved expects unrestricted and uncluttered access to bare skin in the target area, requiring the removal of clothing, and no sooner have
two successive leaves fallen from a deciduous tree that the older portion of the population perceive an imperative to pile on a profusion of extra garments.
Thus at the place of treatment, there is a long-winded process of removing the outer coat, scarf and hat, then the jacket, then a woolly cardigan, then a sweatshirt, then a regular (buttoned) shirt, and finally a vest.
By the time this tedious process is completed, the jab has been administered, and the garments re-donned, the trees are in leaf again, birds are building new nests, and winter is a distant memory.
This is unsatisfactory. Very, very unsatisfactory.
As a second-best option (the best option being brisk euthanasia of the troublesome elder,) BorgCo have developed a Hypodermic-Ready Clothing range.
These garments look just like normal clothes, with the exception that on the upper arm (on both sides) there is a "hatch", securely closed by a zipper, buttons, or hook-and-loop fasteners, as appropriate. All that needs to be done prior to treatment is to release the various covering layers, allowing the nested "hatches" to be hinged back and the skin then treated with antiseptic prior to the injection.
The whole tedious re-sealing process can then be completed elsewhere.