My mum vomited all last night, no other symptoms, i'm scared she has virus and will pass it to me, i have exams to do how do i not get sick?

Staying well: Since you don't know what caused your mum to be ill, it may be hard to avoid it. If she was sick with food poisoning, you are safe if you didn't eat the same thing. If it is viral, not sharing eating or drinking utensils or food and always washing your hands after having contact with her or her dining supplies would help. But if she was contagious before she had symptoms, you may still get it.