How long has Maggie stayed in bed?

M: Hello, Maggie. I hear that you have not felt very well for a few days. How are you today?
W: I’m much better now. Thank you very much.
M: What’s the matter? Nothing serious, I hope.
W: I just had a bad cold and had to stay in bed for two days.
M: I’m glad you are getting better, anyway. What about your sister Judy? I hear she’s sick too.
W: Yes, she was ill, but she’s all right now. She also caught a cold.
M: Oh, I think maybe it is because of the sudden changes of weather. All of us should be more careful.