Variable	Measure and Items	Assessment (score)
Vaccine Literacy functional skills	When reading or listening to information about future vaccines or current vaccines for adults: (1) Did you find that the material as a whole (texts and/or images) was difficult to read? (2) Did he find words you didn’t know? (3) Did you find that the texts were difficult to understand? (4) Did you need much time to understand them? (5) Did you or would you need someone to help you understand them?	Ordinal 4 points Likert scale for ferquency Often (1) Sometimes (2) Rarely (3) Never (4)
Vaccine Literacy interactive (communicative) skills	When looking for information about vaccines for adults: (6) Have you consulted more than one source of information? (7) Did you find the information you were looking for? (8) Did you understand the information found? (9) Have you had the opportunity to use the information? (10) Did you discuss what you understood about vaccinations with your doctor or other people	Ordinal 4 points Likert scale for frequency Often (4) Sometimes (3) Rarely (2) Never (1)
Vaccine Literacy critical skills	(11) Did you consider whether the information collected was about your condition? (12) Have you considered the credibility of the sources? (13) Did you check whether the information was correct? (14) Did you find any useful information to make a decision on whether or not to get vaccinated?	Ordinal 4 points Likert scale for frequency Often (4) Sometimes (3) Rarely (2) Never (1)