There's currently a national shortage of a vaccine every child needs. The DTP protects kids against tetanus, diphtheria, and whooping cough. It's a shot given to children in a series of five doses, starting within the first six months, and ending before the child begins kindergarten. The vaccine has been in short supply since 2000, after two manufacturers stopped making it.
Now, the CDC says the shortage will likely continue at least through the middle of this year.