The document discusses hospital-associated infections (HAIs), also known as nosocomial infections. It defines HAIs as infections that patients acquire during treatment in a hospital setting. The document outlines some key points about HAIs, including that they account for significant illness and death worldwide. It also discusses factors that contribute to HAIs spreading in hospitals, such as host susceptibility, infectious agents, and environmental conditions. Finally, it provides recommendations for preventing HAIs, such as implementing infection control committees, surveillance systems, proper sterilization and hygiene practices, and isolating infected patients.