Which of the following groups is most vulnerable to developing an active infection?

• A. Healthy young adults
• B. Individuals who regularly exercise and eat a balanced diet
• C. People who have received all recommended vaccinations
• D. Individuals with compromised immune systems

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the concept of immune system vulnerability. The immune system protects the body from infections by identifying and destroying pathogens such as bacteria, viruses, and fungi.
2. Step 2: Recognize that individuals with compromised immune systems have weakened defenses, making them less able to fight off infections compared to healthy individuals.
3. Step 3: Compare the groups given: healthy young adults, individuals who exercise and eat well, and vaccinated people all generally have strong or enhanced immune responses.
4. Step 4: Identify that individuals with compromised immune systems (such as those with HIV/AIDS, undergoing chemotherapy, or with certain chronic illnesses) are more susceptible to developing active infections because their immune defenses are impaired.
5. Step 5: Conclude that among the options, the group most vulnerable to active infection is those with compromised immune systems due to their reduced ability to combat pathogens effectively.