How to Control the Mouse's Anxiety and Sickness

In experiments, mice were exposed to a novel context that the mouse had never seen before. When they put them back in the context they actually got the shock, they do still freeze. It's kind of like we've talked about if you eat a sandwich and then for some other reason, you get sick very close. And this doesn't actually even involve anything, I think, conscious. But you start to create an association between that food and being sick so that you can't eat.