Which factor is least likely to increase the risk of developing impetigo?

Frequent hand washing is an important hygiene practice that helps to reduce the risk of many infections, including skin infections like impetigo. Impetigo is commonly caused by bacteria that enter through broken skin or existing wounds and is more likely to spread in crowded conditions or through close contact with infected individuals.

In contrast, injured or damaged skin, crowded living conditions, and contact with infected individuals are all significant risk factors for developing impetigo since these conditions facilitate bacterial entry and transmission. Maintaining good hand hygiene, as highlighted by the practice of frequent hand washing, serves as a preventative measure against the bacteria responsible for impetigo, making it the least likely factor to increase the risk of developing this skin infection.