1. After injecting the Vaccine Syringe, the plunger will be pierced by spike in the bottom of barrel, then plunger is leakage, user can NOT suck medicament again in order to prevent from syringe reuse and cross infection;
2. Single handed operation and activation;
3. Finger stay behind the needle at all times;
4. No change injection technique;
5. Luer silp fits into all standard hypodermic needles;
6. Conform ISO standard of syringes with re-use prevention feature.

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