G.B.
Sometimes it takes months for kids to get over mono. It's one of those illnesses that wipes them out. I wouldn't expect her to even be getting out of bed except to go to the bathroom. She needs lots of liquids and rest. Our bodies heal the best when they're asleep. She may not want to eat anything. She may even go on binges where only one food is appetizing. This is because her tongue is effected by Mono. She'll eventually get her taste buds back.
I would say for the rest of summer she's down. Not doing any activities, going on trips, taking it easy completely. If she has big plans for travel then she needs to rest as much as possible, even if she gets feeling better. Her body will slowly build back up and it's going to be really easy to get other illnesses. Her resistance is down and will stay that way for a while.