Table 2. Message frames and nudges.

Message frame	Nudge
Social norm message	“Most people in your community are getting their children vaccinated against polio. Get your child vaccinated against polio.”
Fear message	“Polio causes paralysis and sometimes death. Get your child vaccinated against polio!”
Safety message	“Polio vaccines are safe. Get your child vaccinated against polio.”
Messenger message	“Polio vaccines are recommended by health professionals. Get your child vaccinated against polio.
Fact-based /control message	“Protect your child against polio. Get your child vaccinated against polio.”