Table 1.

Sources of antenatal influenza vaccination information evaluated

	Source of influenza vaccination information
	Western Australian Antenatal Influenza Vaccination Database	Health service B database	Hospital A database
Population covered	All pregnant women within Western Australia	Women who deliver in a hospital within health service B	Women who deliver at hospital A
Data collected	Full name, date of birth, vaccination provider, date of vaccination, brand and batch number of vaccine, and trimester of vaccination.	Vaccination status (yes/no)	Vaccination status (yes/no)
Time data collected and entered into database	At time of vaccination	After delivery and before hospital discharge	After delivery and before hospital discharge
Person responsible for data collection and entry	Immunisation provider	Health professional attending birth	Health professional attending birth