Dose-sparing syringes thumb|A dose-sparing syringe and needle being used to draw up a COVID-19 vaccine A dose-sparing syringe is one which minimises the amount of liquid remaining in the barrel after the plunger has been depressed. These syringes feature a combined needle and syringe, and a protrusion on the face of the plunger to expel liquid from the needle hub. Such syringes were particularly popular during the COVID-19 pandemic as vaccines were in short supply.
Dose-sparing syringes thumb|A dose-sparing syringe and needle being used to draw up a COVID-19 vaccine A dose-sparing syringe is one which mi,nimises the amount of liquid remaining in the barrel after the plunger has been depressed. These syringes feature a combined needle and syringe and a protrusion on the face of the plunger to expel liquid from the needle hub. Such syringes were particularly popular during the COVID-19 pandemic as vaccines were in short supply.