The Rationality of a Flu Shot

flu shot, vaccine, doctor, reason, rational, epistemologyI don’t like shots, in fact, I avoid them. Ironically, I visited my doctor yesterday, and left with a band-aid on my arm. I didn’t plan to get a flu shot, in fact I’ve never had one and never wanted one, but he talked me into it. I thought the whole dialectic was interesting, so I’ll share it with you. I think it illustrates some valuable principles of rationality and good belief formation. (The doctor actually said some of these things, and some of them I said to myself during the conversation.)

The Conversation

“Have you considered getting a flu shot?”
“No, not really. I never get them.”
“Would you be open to the idea?”
“Isn’t the flu a whole range of viruses rather than only one virus?”
“Yes.”
“But aren’t flu vaccines just aimed at one strain of the flu? That means that it protects you (imperfectly) against one strain out of many, which doesn’t seem very helpful. It would be like having an air bag that only inflates when I hit a red car.”
“Actually, the vaccine is aimed at multiple flu viruses, based on the most common ones from last year.”
“Ok, that’s good to know. But still, I hardly ever get sick or get the flu.”
“Well, even if you have a very low risk of getting the flu, the shot will lower the risk even more.” (The CDC website says that, “flu vaccination reduces the risk of flu illness by between 40% and 60% among the overall population.”)
“Yeah, that seems right. But I’m still not sure it lowers the risk enough to make it worth it.”
“What’s the downside of getting one, especially if it’s free?”
flu shot, vaccine, doctor, reason, rational, epistemology“I don’t like shots. Yeah, that’s not a great argument, I suppose.”
“Consider this: Lowering your own risk also benefits family health and public health. If your chance is lower, that lowers the risk of your kids getting sick or anyone around you getting sick, like in your church. That’s just good for everyone in Columbia.”
“Ok, I’m starting to realize that I don’t have any good reason, or enough good reasons to justify not getting a shot.” (He did address the concerns many people have about the vaccine causing various side-effects or illness, though I wasn’t worried about it. The chances are negligible. He also explained that the vaccine they use is protein-based, which means it doesn’t contain the actual virus, so it can’t give you the flu.)

So, next thing I know, the nurse comes in with the syringe. I tried to relax and remember that this is a very fleeting pain. Happily, the nurse was quite skilled and I hardly felt it. The arm is a bit sore today, but that’s the only negative effect.

The Takeaway 

What’s the takeaway here? 1) Be open to dialogue. You might learn something. You also might discover that your reasons, once they are out on the table, turn out not to be very strong. 2) Irrational fears shouldn’t guide our actions. The fear of a shot, for us needlephobes, is generally way over-blown and not realistic. I.e., it isn’t as bad as you think. 3) Public health may not have occurred to you as a relevant factor, but it should. It isn’t just about *you*.

For the Flu Shot Skeptics

skeptic faith thinkingNow, I know people worry about certain dangers of vaccines or flu shots. But I researched it a little (perhaps inadequately), and I couldn’t find any documented sources citing scientific evidence about the dangers of today’s flu shots. Flu shots have been modified over the years to eliminate anything that was discovered to be harmful.

“But what about the dangers we have yet to discover?” True, we must always admit the possibility that we’ll discover a dangerous chemical  later, after the damage is done. But it simply isn’t reasonable or practical to live your life dodging mere possible dangers. There would be no way to avoid everything that could harm you. We should try to avoid probable harms — things that we have good evidence for. That’s the only feasible way to live. Right now, the research says that flu shots are safe. Also, if you avoid flu shots based on a few bad stories you’ve heard, you’re probably falling prey to the availability bias (I might be doing this as well) or the fallacy of probability neglect.

“But given that we’ve repeatedly found new dangers in some medicines and treatments, shouldn’t we expect that there are lots of undiscovered dangers lurking in these drugs?” That’s an inductive argument, and I think it’s weak. Here’s why: medicine isn’t progressing slowly, like repeatedly adding 1 to a number and watching it grow. It progresses more like multiplying. So not only do we detect and solve new problems every year, but our methods for detecting, solving and preventing problems gets better every year, multiplying the effectiveness of medicine. That’s my perception, but I could be wrong.

Feedback

Persuaded? Let me know what you think. I’m open to hearing the arguments on the other side, provided you have documented evidence from reliable sources.

3 Replies to “The Rationality of a Flu Shot”

  1. Not convinced! I never get the flu either, and the shot is never free for my age group. Even if it were, I have a tendency to do the opposite ‘Big Brother’ is pushing for!! Based on historical misuse i.e. inhumane syphilis studies conducted way back when/exposed way later.

    1. If it isn’t free, that certainly changes the equation. But I don’t think it is good reasoning to avoid them because of unethical syphilis studies 50 years ago. The flu shot contents are public knowledge as are the vaccine programs, so not much chance of diabolical projects.

      1. One man’s good reasoning is another man’s foolishness! I did not mean to imply any diabolical association with flu shots, and public vaccination of children for public health safety as a whole; I am for this, just not unnecessary chemicals in my own body, I lean toward a more holistic approach. Intentions are good, but use of fear tactics and persuasion is not. If they came up with a shot to prevent cancer, would you jump on the band wagon, even if you had no family history of it…just to be safe, as a preventative shot? I would not. That’s why I love America – freedom of choice & speech…thanks for your opinion!

Leave a Reply

Your email address will not be published. Required fields are marked *