The old Smallpox vaccinations were never injected! A needle was dipped into a vial, then it was scratched or poked on the skin. The bifurcated needle, developed for WHO for the eradication project starting in 1967, probably made for smaller scars. Those needles which are still used for administering the ACAM2000 Smallpox vaccine for the US armed forces, require just 10% of the Smallpox vaccine used by previous needles. This meant bottles that held 25 doses could be used to administer 250 doses!
