My student was telling me that his aunt who is a nurse is always on call.
I said this means: they can call her at any time and she has to go to the hospital.
My question is: What do you say "estoy de guardia"?
You can be "de guardia" being
- a nurse: a nurse at home, a call might or might not come;
a nurse working at the hospital on guard (??);
a pharmacy open at night or even 24 hours or
the pharmacist himself working at night.
I am especially interested in the nurse working at night ..would that also be: the nurse on call, even though she is actually there?