Many diseases, especially in rabbits, you cannot see. That's why we quarantine. The stress of a move can make the healthiest rabbit become quite ill, and by the time you see it, you may have infected, and effectively killed all of your rabbits.
Quarantine for 30 days, hard and fast rule, even when I bring home a rabbit from my best friend. Its worth it. Because its just not worth the risk to your other rabbits.
Although you've already put her in with another rabbit, I would remove her, and put her in quarantine. After 30 days, with no symptoms, including wet or gooky eyes (which can be a symptom of disease), then, you can introduce her to a buck if she is about 6 months of age.