Which of the following is a method used to prevent the spread of infection?

Regular handwashing is a fundamental method used to prevent the spread of infection. This practice effectively removes pathogens, dirt, and impurities from the hands, significantly reducing the likelihood of transmitting infectious agents. By using soap and water, or a hand sanitizer containing at least 60% alcohol, individuals can disrupt the cycle of infection as many germs are commonly spread through hand contact with contaminated surfaces and then touching the face or other surfaces.

In contrast, the other options do not contribute to infection prevention. Consuming a high-sugar diet can negatively impact the immune system, making the body more susceptible to infections. Staying in crowded places increases the risk of exposure to infectious agents, as close contact with large groups of people can facilitate the spread of germs. Encouraging unfiltered water consumption poses a risk of ingesting waterborne pathogens that could lead to illness. Understanding and implementing effective infection control practices like regular handwashing is vital for maintaining health and preventing outbreaks.