We wanted to know if the length of time food is in contact with a contaminated surface affected the rate of transfer of bacteria to the food.

我们想知道食物与被污染的表面接触的时间长短是否会影响细菌转移到食物上的速度。

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The highly contagious virus can be spread by contact with contaminated surfaces or objects, contact with a person who has the infection or through contaminated food and water.

BBC: Winter vomiting bug norovirus levels dip over Christmas

Norovirus can be spread through contact with contaminated surfaces or objects, by contact with an infected person, or by the consumption of contaminated food or water.

BBC: Winter vomiting cases at 1.1 million

The disease is spread by direct contact with cats or eating contaminated food.

BBC: Infection risk posed by cats revealed