Inference Listening Lesson - Very Sick

Where is John?

At home
At school
At the dentist office
At the hospital

A: How's John?
B: He's very sick. The doctors are keeping him for several days.
A: Have you visited him yet?
B: I'm going there today. Would you like to go with me?
A: I would like to, but I think I'm coming down with a cold.
B: Then you should stay home. The doctors don't want people to spread germs to the other patients.
A: Please give him my regards.