Fig. 1.
Pregnant patients aged 14–49 years in the Vaccine Safety Datalink (VSD) with pregnancies ending in live births and stillbirths, 2012–2015: case and control flow diagram. *Vaccine-related exclusions include exposure to foreign vaccine formulations, experimental vaccines, vaccines licensed only for infants, and vaccines where unknown whether live or inactivated formulation administered. †Includes live births, ectopic pregnancies, early spontaneous abortions, and therapeutic abortions miscoded as stillbirths.