Figure 3.

Histograms of study week during which delivery occurred according to vaccination status, trimester of vaccination, and type of influenza vaccine (monovalent or trivalent), Vaccine Safety Datalink Cohort, 2009–2010. A) Not vaccinated with monovalent influenza vaccine (MIV); B) MIV in first the trimester; C) MIV in second the trimester; D) MIV in third the trimester; E) not vaccinated with trivalent influenza vaccine (TIV); F) TIV in first the trimester; G) TIV in second the trimester; and H) TIV in third the trimester.