Priority Intervention: Infection Control
The correct answer is to
implement strict isolation precautions. Measles is one of the most highly contagious infectious diseases, caused by the measles virus. The virus is transmitted via airborne droplets and can remain suspended in the air for up to
2 hours after an infected person leaves the area. The incubation period ranges from
7 to 21 days, and individuals are contagious from
4 days before to
4 days after the onset of the characteristic rash . Given this extreme transmissibility, the immediate and highest priority upon admission is to protect other patients, visitors, and healthcare staff by preventing the spread of the virus. This aligns with the fundamental NCLEX-RN principle of prioritizing safety and infection control, which often takes precedence over other physiological needs in a healthcare setting when a community health risk is present.
Why Airborne Precautions Are Essential
Strict isolation for measles specifically requires
airborne precautions, not just standard or droplet precautions. This involves placing the child in a
negative-pressure isolation room (airborne infection isolation room, AIIR) with the door kept closed. Anyone entering the room must wear an N95 respirator or a powered air-purifying respirator (PAPR), regardless of their immune status, because the virus particles are small enough to remain airborne and be inhaled. The resurgence of measles in recent years, with over
2200 cases reported in 2025 and
2073 cases in the first half of 2026, is directly linked to declining vaccination rates, increasing the pool of susceptible individuals . In a hospital setting, a single unrecognized case can lead to a major outbreak, making immediate isolation the most critical nursing action to ensure optimal outcomes for the patient and public health safety.
Analysis of Other Options
While the other interventions are components of supportive care for a child with measles, they do not address the most immediate safety risk and are therefore lower priorities upon admission.
- Option 1: Administer acetaminophen for fever reduction. Fever management is important for comfort and preventing febrile seizures, but it is a comfort measure, not a safety priority. The immediate threat of viral transmission to others outweighs the need to treat a non-life-threatening fever.
- Option 3: Encourage increased fluid intake. Maintaining hydration is a key supportive measure, especially if the child has a fever, but it is not the first action upon admission. This intervention would be implemented after the child is safely placed in appropriate isolation.
- Option 4: Apply cool compresses to the rash. This is a comfort measure for pruritus. The maculopapular rash of measles is not the primary source of contagion; the respiratory secretions are. Addressing skin discomfort is a lower priority than preventing an airborne disease outbreak.
Clinical Decision-Making Using the Nursing Process
In an NCLEX-RN context, when a question asks for the "priority" intervention, it is testing your ability to apply
Maslow's hierarchy of needs and the
ABCs (Airway, Breathing, Circulation) within a safety framework. However, for a highly contagious disease, the
safety of the environment takes immediate precedence. The nursing process begins with assessment, but the first implementation step upon recognizing a suspected or confirmed case of measles is to initiate isolation. The pathophysiology of measles involves initial viral replication in the respiratory epithelium, followed by viremia and the widespread maculopapular rash. The period of highest contagion is during the prodromal phase (fever, cough, coryza, conjunctivitis) before the rash even appears, which is why prompt recognition and isolation by acute care nurses are central to management .