Fact vs Fallacy: The Anti-Vaccine Discussion Reloaded

"No longer is it sufficient to win arguments based on a factual and scientific basis, but rather scientists and medical practitioners have to focus on conveying confidence and reassurance on both an informative and emotional level to those with doubts and fears."

In light of the fact that the pro- vs anti-vaccine discussion has gained traction during the COVID-19 pandemic, this paper discusses vaccine hesitancy from a psychological, historical, and philosophical point of view. It provides an analysis of common anti-vaccine (anti-vax) arguments and the psychological impact these arguments may have on undecided individuals. The discussion also presents approaches that physicians and healthcare practitioners can use in engaging in conversations with vaccine-hesitant individuals.

Noting that anti-vaccination sentiments have been present worldwide as long as modern-day vaccines themselves, the authors reflect on the fact that these viewpoints are widespread today in social media, relative to their pro-vaccine counterparts. The anti-vaccination proponents are a heterogeneous group; some want to avoid all vaccination, while others want to avoid certain specific vaccinations or reduce or delay the overall number of vaccinations. Evidence shows that the anti-vaccine community is to a large extent made up of educated individuals who have the capacity for critical thinking and a desire to discuss the subject with their physician. However, the media often caricature anti-vaxxers as unsophisticated laypeople from lower socioeconomic strata, and the general attitude of the scientific literature towards anti-vaxxers may appear hostile and encourage their censorship.

The paper examines and challenges some of the arguments advanced by anti-vaxxers, noting that they are often grounded in anecdotal evidence, which can lead to "post hoc ergo propter hoc fallacies", meaning "after this, therefore because of this". False correlations can lead to arguments that can be propagated as fact through anti-vaccine blogs, social media pages, and news outlets. In addition, there are several types of biases that can affect judgment; for example, there is a naturalist bias in the anti-vax community, which maintains that vaccines are manmade and therefore unnatural. Contributing to bias are search engine algorithms that filter an internet user's online experiences on the basis of prior searches and interactions. Thus, a person who has searched for anti-vax topics may in the future searches be presented with more or similar anti-vax information, creating a bubble of artificial confirmation bias that limits their exposure to alternative opinions. That said, some social media platforms have made attempts to correct misinformation or limit its spread.

Another contributor to anti-vaccine sentiments is mistrust: of modern medicine, "big pharma", and/or government institutions. An example of anti-vax conspiracy theories is the belief that Bill Gates may be using the SARS-nCoV-2 virus vaccination to microchip the population. In the face of such mistrust, healthcare professionals are urged to increase the quantity and quality of reliable, scientifically sound vaccine information online and in their conversations with patients. Relevant here, as the authors outline, is the distinction between denialists and fair-minded skeptics: These two groups process information differently, ask different sorts of questions, and make different types of arguments. In the case of denialists, demonstrating that the anti-vax argument is unfair, biased, lopsided, or distorting might help reveal lack of validity. Also, if denialists could be made to see, for example, that they are not considering all the evidence but only a portion of it, it might help facilitate a more reasonable conversation.

In light of this analysis, the authors stress that scientists must encourage frank, open, and frequent discourse with anti-vaxxers. After all, the purpose of science is to promote ideas and remove uncertainty in the minds of people, rather than to silence them. Another issue is "how the pro-vax community can present information in a fair, balanced, but palatable way that opens the door for discussion with both neutral parties and skeptics. The distrust of many for the medical establishment has deep roots and is not entirely unfounded; scientists should not be quick to dismiss it. Creating narrative stories can be a helpful tactic, as much as scientists tend to prefer data and dry facts....Storytelling can be effective communication and there is no reason that it cannot be used by pro-vaxxers without sacrificing scientific soundness and accuracy."

The authors point out that the anti-vaccination movement "is actually a promising feature of human development, as it demonstrates a widespread tendency of individuals to think critically and independently. This is, however, not to say that the arguments are correct, only that they indicate a desire on the part of individuals to research and reach independent conclusions about important health-related topics."

In conclusion: "scientists must learn how to expose logical fallacies and other problems with denialists, and public health experts must elevate the use of storytelling over data presentation. It is fear, misinformation, and mistrust that are driving the anti-vax movement and scientists, the healthcare profession, and public health must provide open discourse and fair, balanced, accurate information that can assure patients rather than reinforce their despair."