A nurse is preparing to administer a vaccine to a 4-year-old child. Which of the following vaccines should the nurse administer?

Choice A reason: Placing the client in a private room is not necessary for a client who has a high WBC count, unless they have other indications for isolation, such as an infectious disease. A high WBC count may indicate inflammation, infection, or other conditions that affect the immune system.

Choice B reason: Monitoring the client's temperature every 4 hr is an appropriate action for a nurse to take for a client who has a high WBC count. A fever is a common sign of infection or inflammation, and it may require further intervention, such as antibiotics or antipyretics.

Choice C reason: Administering an antihistamine as prescribed is not related to a high WBC count. Antihistamines are used to treat allergic reactions, which may cause a low WBC count due to the release of histamine from mast cells.

Choice D reason: Encouraging the client to increase fluid intake is not specific to a high WBC count. Fluid intake should be based on the client's hydration status, urine output, and other factors. Increasing fluid intake may help flush out toxins or bacteria, but it is not a priority action for a client who has a high WBC count.

Choice A reason: A protective environment is a type of isolation precaution that is used for patients who are immunocompromised and at high risk of infection from environmental sources, such as fungi or bacteria. It involves using a private room with positive air pressure, high-efficiency particulate air (HEPA) filtration, and strict hand hygiene. It is not indicated for patients who have measles, as they are the source of infection, not the susceptible host.

Choice B reason: Airborne is a type of isolation precaution that is used for patients who have diseases that are transmitted by small droplets that can remain suspended in the air and travel over long distances, such as tuberculosis, chickenpox, or measles. It involves using a private room with negative air pressure, HEPA filtration, and respiratory protection for health care workers and visitors. It is the appropriate isolation precaution for patients who have measles, as it prevents the spread of the virus to others.

Choice C reason: Contact is a type of isolation precaution that is used for patients who have diseases that are transmitted by direct or indirect contact with the patient or their environment, such as Clostridioides difficile, scabies, or impetigo. It involves using a private room or cohorting with similar patients, wearing gloves and gowns, and using dedicated equipment. It is not indicated for patients who have measles, as the disease is not spread by contact.

Choice D reason: Droplet is a type of isolation precaution that is used for patients who have diseases that are transmitted by large droplets that are generated by coughing, sneezing, or talking, such as influenza, pertussis, or meningitis. It involves using a private room or cohorting with similar patients, wearing a surgical mask, and maintaining a distance of at least 3 feet from the patient. It is not indicated for patients who have measles, as the disease is spread by airborne transmission.