Table 4. Sub-analysis of exposure to flu promotion posts on social media at follow-up^a.

	Exposure to Posts	No Exposure to Posts	p
I received the flu vaccine in the past 6 months.	50.9% (195)	43.3% (1011)	.005
The flu vaccine is safe for most people.	71.3% (273)	67.8% (1584)	.176
The flu vaccine is effective.	58.2% (223)	46.8% (1093)	< .001
It’s never too late in the flu season to get the flu vaccine.	67.1% (257)	62.3% (1456)	.073
Getting the flu vaccine is the best way to protect myself against the flu.	61.9% (237)	56.7% (1324)	.056
Getting the flu vaccine is the best way to protect others against the flu.	64.2% (246)	55.5% (1296)	.001
I would get the flu vaccine if everyone else was getting it.	48.0% (184)	35.4% (828)	< .001
Getting the flu vaccine is worth the time and effort.	67.1% (257)	59.1% (1381)	.003

^a Data are % (N). Table includes follow-up data for respondents who reported exposure to flu vaccination promotion posts in the campaign region only.