How does proper hand washing and wearing PPE by healthcare staff compared to improper hand washing and lack of PPE by healthcare staff, prevent the spread of nosocomial infections during a patient’s two month long stay?

How does proper hand washing and wearing PPE by healthcare staff compared to improper hand washing and lack of PPE by healthcare staff, prevent the spread of nosocomial infections during a patient’s two month long stay?

Hello, this paper is an Evidence Based Practice Synthesis Paper based off a PICOT question. My PICOT question is “In an intense care unit hospital, how does proper hand washing and wearing PPE by healthcare staff compared to improper hand washing and lack of PPE by healthcare staff, prevent the spread of nosocomial infections during a patient’s two month long stay?