The toddler looking up at Dr. Melanie Seifman in her Washington, D.C., exam room seems a little dazed.
It could be because she just woke up from a nap at daycare. It could be that she remembers the shots she got last time, and she knows what's coming.
The little girl is catching up on some vaccines she's behind on: missing doses of the DTaP and polio vaccines. She's over two years old — both of those shots are supposed to happen at a baby's six-month check up.