This can be especially frustrating when it is a friend or loved one who is putting themselves and those around them at risk. We are behavioral scientists, and we wanted to know: How do you convince someone to get the vaccine?
The flu shot doesn't just benefit the person who gets it. It also helps protect everyone around the vaccinated person, such as the very young, the very old and people whose immune systems are compromised. People in these groups often cannot get the vaccine, or it is less effective for them.
It's a bargain
We would love to tell you that a logical presentation of facts like those we listed above is the best method for convincing someone. Unfortunately, it usually isn't.
It really seems like we should just be able to tell our spouse, uncle or babysitter how the vaccine works, what it does for us and why it's important, and then, watch them run straight to the nearest immunization clinic.
The surprising truth is that telling people the facts about the flu shot just doesn't work.
However, our research, funded by the Robert Wood Johnson Evidence For Action program, has found that showcasing the flu shot in different ways - like explaining what a good deal it is - can be much more convincing.
For instance, even though the true cost of getting a flu shot is typically between US$40 and $70, most people can receive one free or for about $10 by using insurance, an employer's program or finding a community clinic.
That's a 75% to 100% savings. If televisions were offered at that discount, people would be lined up out the door of Best Buy.
These studies have shown that some of the consumer excitement people feel when getting great discounts on household goods can be transferred to preventive care activities, like flu shots.
Reminding people what a great deal flu shots are is a much more effective strategy to increase interest than listing the health and societal benefits. In our studies, it's been even more effective than showing a 30-second informational video about flu shots from the CDC website.
When and where?
So now your friend or loved one is a little more interested, maybe even willing to get the shot. How do you make sure they will follow through?
If it's your spouse or child, you might be able to make them an appointment.
In a separate set of studies, we found that signing up people for a specific date and time to get a flu shot - without asking them for convenient dates or knowing anything about their schedules - was 36% more effective at driving flu shot uptake than sending an email that asked people to click to make an appointment.
Even though some people changed their appointment date or time, and some didn't show up, more people who received a randomly assigned appointment got the flu shot than those who had to make their own appointments.
If you can't just make them an appointment, you can also nudge them to create what's called an "implementation intention," or a concrete, specific set of plans about when and where something will happen.
Implementation intentions increase the likelihood of getting the flu shot by as much as 4.2%. For example, will they go to the pharmacy near their house for the vaccine? When will they do it?
Tying it to specific activities can help them remember - like "after dropping off the kids at soccer practice on Saturday morning I will stop by the CVS on the corner of Main Street to get a flu shot" - is a great implementation intention.
Help the person develop an implementation intention by asking simple questions or making suggestions about when and where they might be able to get the vaccine.
Encouraging them to write them down - or even better, set a reminder in their phone or calendar - can also be helpful.
The flu is no joke
Though the optimal time to get a flu shot is much earlier during the flu season, it is not too late to get the shot, as the season sometimes goes as late as May.
But if presenting the facts to your friends and family isn't encouraging them to get the shot, try emphasizing the great value, making appointments for them or encouraging them to set and record concrete implementation intentions.
They will protect their health and get a great bargain too.
[ Like what you've read? Want more? Sign up for The Conversation's daily newsletter. ]
Authors: Helen Colby - Assistant Professor of Marketing, Indiana University | Meng Li - Associate Professor of Health and Behavioral Sciences, University of Colorado Denver