Final answer:
To protect patients with severely depressed immune systems, it is important to maintain strict hand hygiene, isolate them from sick individuals, and use N95 masks for respiratory protection.
Step-by-step explanation:
The protective precautions for patients with severely depressed immune systems include:
- Strict hand hygiene: Washing hands thoroughly and frequently with soap and water or using hand sanitizer can help prevent the spread of pathogens from surfaces to the patient.
- Isolation from sick individuals: Keeping the patient separate from individuals who may be contagious reduces the risk of infection.
- Use of N95 masks: N95 masks can provide a higher level of filtration and protection against airborne particles, reducing the risk of respiratory infections.