Norovirus is most commonly transmitted through which of the following?

Norovirus is primarily transmitted through ready-to-eat foods, which is why this answer is correct. The virus can easily be transferred to foods that do not require cooking before consumption. This includes items such as salads, fruits, and sandwiches, which are commonly handled by foodworkers who may not practice stringent hand hygiene, especially if they are ill or have recently handled contaminated surfaces.

Ready-to-eat foods pose a particular risk because they don’t undergo further cooking that might kill the virus, allowing it to reach the consumer's gastrointestinal tract more readily. Additionally, norovirus can be present in high quantities in the vomit or feces of infected individuals, which can contaminate food during preparation or service.

While contaminated water and undercooked meats can also be sources of foodborne illness, norovirus is less commonly associated with these routes. Canned vegetables are generally safe from norovirus as the canning process involves high temperatures that kill pathogens, including norovirus. This puts ready-to-eat foods at a higher risk for transmission of the virus, making it crucial to ensure proper handwashing and hygiene practices in food service settings.