![]() If using the new high-efficiency low dead space syringe recommended by Pfizer-BioNTech, which has a dead space volume of 0.035 mL, that is still about an 11% loss for a 0.30 mL injection. When you draw up 0.30 mL of fluid into a syringe, you are actually drawing up 0.38 mL the extra 0.08 mL in the dead space amounts to about 20% of vaccine material being discarded. However, this discards about 0.08 mL of fluid left in the dead space of the standard 25 g 1.5 inch syringe/needle. The current Pfizer-BioNTech vaccine injection methods are simple: withdraw from the vial 0.30 mL of fluid, insert the needle into the deltoid muscle, inject, withdraw the needle, discard the syringe/needle into the disposal bin-done. ![]()
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