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How does injecting drugs with nonsterile needles increase the risk of infectious disease?

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drug use The use of psychoactive drugs, such as pain medications or illegal substances, often results in emotional, physical, and social harm.

Injecting drugs with nonsterile needles significantly increases the risk of infectious disease because it facilitates the direct transfer of bloodborne pathogens from one person to another. When needles or syringes are shared or reused, they can retain microscopic amounts of contaminated blood, which then enters the bloodstream of the next user.12

This practice is a primary route for the transmission of serious viral infections, most notably:

Hepatitis C: A major cause of chronic liver disease, which is highly prevalent among individuals who inject drugs due to the reuse of unsterilized equipment.2
HIV: The virus that causes AIDS is frequently spread through the sharing of needles, as the virus can be transferred directly via blood.13
Hepatitis B: Another bloodborne virus that can be transmitted through contact with contaminated injection equipment.14

Public health initiatives, such as syringe exchange services and safe injection sites, aim to mitigate these risks by providing access to sterile equipment, thereby preventing the transmission of these life-threatening diseases.45