What type of infections does proper hand hygiene predominantly aim to prevent?

Proper hand hygiene predominantly aims to prevent healthcare-associated infections. These infections, often referred to as nosocomial infections, occur in healthcare settings like hospitals and clinics, where patients are more vulnerable due to various factors, including weakened immune systems, invasive procedures, and prolonged stays.

Effective hand hygiene practices help eliminate pathogens that can be transmitted from one person to another, particularly in environments where infection control is critical. By washing hands or using hand sanitizers, healthcare providers significantly reduce the risk of transmitting bacteria and viruses that may lead to infections post-surgery or during treatments.

The other options focus on conditions or situations that do not primarily relate to the context of hand hygiene in a healthcare setting. The common cold and flu are indeed viral infections that can spread from person to person, but they are not the primary focus of hand hygiene protocols in healthcare facilities. Seasonal allergies and chronic diseases are not infections at all, thus are unrelated to the goals of hand hygiene practices.