What is a primary prevention step for hepatitis A?

Frequent hand washing is a primary prevention step for hepatitis A because this virus is primarily transmitted through the fecal-oral route. The virus can be present in the feces of an infected person, and proper hand hygiene is crucial in reducing the risk of transmission. By thoroughly washing hands with soap and water after using the restroom, and before preparing or consuming food, individuals can significantly lower the chances of spreading the virus.

While other options, such as cooking food to proper temperatures, avoiding raw vegetables, and consuming only bottled water, can help reduce the risk of foodborne illnesses and certain pathogens, they are not as directly related to the transmission of hepatitis A as hand washing practices. Proper hand hygiene plays a fundamental role in preventing this specific virus from spreading within communities.