Which of the following is one of the six links in the chain of infection?

• A. Immunity
• B. Pathogen
• C. Cure
• D. Recovery

Answer: (B)

The question is about the chain of infection, where an infectious agent must be present to start an infection. The infectious agent, or pathogen, is one of the essential links in that chain. Without a pathogen, there is nothing to cause disease, so recognizing the pathogen as a link helps explain how infections begin and how they spread.

In a tattoo or piercing setting, breaking this chain at any point—through sterilization of instruments, proper hand hygiene, wearing gloves, using disposable items, and cleaning surfaces—prevents transmission. Immunity, cure, and recovery describe the body's defenses or the outcome after infection, not a step that allows the chain to continue.

So the pathogen fits as the correct link because it is the actual cause of infection, whereas immunity is the body's defense, and cure or recovery are what happens after infection has occurred.