Which of these statements is true about Norovirus?

Norovirus is primarily transmitted through contaminated food and surfaces, and one of the most significant ways it spreads is through infected food handlers. When a person carrying the virus prepares or handles food without proper hygiene practices, they can easily transfer the virus to the food, leading to outbreaks among consumers. This is especially concerning in settings such as restaurants, catering services, and other food preparation environments where many people can be affected quickly.

The other statements are not accurate representations of Norovirus. It does not cause severe allergic reactions, is not effectively killed by high cooking temperatures (since it can survive typical cooking processes), and it is not primarily associated with livestock products but rather with contaminated water, vegetables, and ready-to-eat foods.