Unsafe medical injections pose a massive public health threat across developing healthcare systems, including Nigeria. Billions of injections are administered annually worldwide, and a significant portion involves reused syringes or needles without proper sterilization. This practice transmits bloodborne pathogens, primarily hepatitis B virus, hepatitis C virus, and human immunodeficiency virus (HIV). Beyond viral infections, unhygienic practices lead to local bacterial abscesses and systemic sepsis. The World Health Organization defines a safe injection as one that does not harm the recipient, does not expose the provider to any avoidable risks, and does not result in waste that is dangerous for other people.
The WHO framework rests on three fundamental pillars designed to eliminate transmission risks during therapeutic or immunization injections.
A common misconception in busy clinical wards is that intramuscular administration requires an older glass syringe boiled for reuse; modern standards mandate sterile, single-use devices for every patient contact.
Hand hygiene serves as the single most critical intervention for preventing healthcare-associated infections. Before preparing any injection, nurses must perform hand hygiene using either an alcohol-based rub or soap and water if hands are visibly soiled. Aseptic technique must be maintained when touching medication vials, ampoules, and needle hubs. Touching the needle shaft or the rubber septum of a multidose vial with bare fingers contaminates the sterile field. Gloves should be worn if there is a risk of exposure to blood or body fluids, though gloves never replace the necessity of cleaning hands between patients.
Reusing disposable syringes or needles—even on the same patient or utilizing the same needle for drawing up medication and injecting—carries severe infection risks. To combat intentional or accidental reuse, the WHO advocates for Auto-Disable (AD) syringes for immunization and fixed-dose therapeutic injections. An AD syringe automatically locks or breaks after a single plunger depression, rendering it physically impossible to use a second time. Nurses must inspect packaging integrity before use and immediately discard any device showing compromised seals.
Proper disposal of sharps is the final line of defense against community and occupational needle-stick injuries.
Discarding sharps into ordinary refuse bins or open waste cartons exposes domestic workers, waste pickers, and children to life-threatening infections.
Despite strict protocols, accidental sharps injuries still occur in clinical environments. When a needle-stick injury happens, the nurse must act immediately to minimize pathogen transmission.