The mockingjay represents defiance in the novel, with the bird’s symbolism deriving initially from its origins. The mockingjay, we learn, came about as a result of a failed project by the Capitol to spy on the rebellious districts, and since then the bird has served as a reminder of this failure and the districts’ recalcitrance—Katniss describes them as “something of a slap in the face to the Capitol.” The mockingjay pin Madge gives to Katniss is at first an emblem of that resistance. Later in the novel, however, the birds come to symbolize a different sort of defiance. Mockingjays become a link between Katniss and Rue, with the two using the birds to communicate. When Rue dies, Katniss decorates her body with flowers as a means of memorializing Rue, but also to defy the Capitol. When Katniss later sees mockingjays, they remind her of Rue, and that memory inevitably stirs her hatred of the Capitol and her wish to rebel, and take revenge, against it. The mockingjay consequently takes on an additional layer of symbolism, representing not only a general rebellion against the Capitol, but also Katniss’s specific desire to defy it.
Doctors (and nurses) take an oath about helping people (not the whole thing, but I don't know it as I am not a doctor or nurse). If the doctor is understanding, they might even help set up a payment plan.
