France: How the hive mind is killing the herd immunity that keeps us all safe

27 Jan, 2018
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27 JANUARY 2018 – 08:20 AGENCY STAFF  Paris — A rising tide of suspicion amplified by social networks has eroded public trust in modern medicine, leaving scientists and health officials scrambling for ways to shore up its credibility, experts say. Especially in rich nations, faith has waned in vaccines that have saved millions from the ravages of polio, tetanus, small pox, influenza and many other once rampant and deadly diseases. “The level of confidence is not what it was 20 years ago,” French immunologist Alain Fischer told AFP. “It is crumbling.” The scale of suspicion is startling. A survey conducted by the British Academy of Medical Sciences last year found that only 37% of Britons trusted evidence from medical research. Two-thirds cited friends and family as more reliable. A quarter of 1,500 parents polled in the US in 2017 believed that vaccines can cause autism in healthy children, despite a complete lack of credible evidence. One in 10 had refused to give their offspring at least one vaccine. In France, meanwhile, more than 40% of adults have expressed doubt about vaccine efficacy or safety. These opinions have consequences. Whooping cough, measles and mumps — communicable diseases that had effectively disappeared — have all seen a resurgence in the US in the past decade because the number of parents refusing to inoculate their toddlers rose above the threshold needed to ensure what scientists call “herd immunity”. In France, health authorities were forced to take action: from this year, any child who has not been vaccinated for 11 specific diseases will not be admitted to kindergarten or school. Many factors account for this upsurge in mistrust, experts say. Most damaging, perhaps, are a series of scandals involving inadequately vetted drugs, poor oversight by health officials and attempted cover-ups. France was profoundly shaken by a blood scandal in which nearly 4,000 people were infected with HIV in the 1980s after receiving contaminated blood transfusions. In 2010, off-label use of a diabetes drug called Mediator was shown to cause fatal heart problems. And last year, thousands of severe malformations in newborns were attributed to the epilepsy medication Valproate. Similar scandals relating to EpiPens for anaphylaxis and to cancer drugs, as well as price gouging and concern about the over-prescription of opioids, have shaken public confidence in doctors and Big Pharma. In a recent survey in Britain, 82% of doctors and 67% of adults agreed that clinical trials funded by drug companies were often biased to produce a positive outcome. A medical misstep of another kind was the publication in 1998 by The Lancet, a respected medical journal, of research that drew a causal link between vaccines and autism in children. When it was later revealed that evidence underlying this claim had been falsified, the study was withdrawn and its author, Andrew Wakefield, was barred from the profession. But the damage was done. Vaccines and other medicines are also a victim of their success. “We no longer see the diseases, just reports about possible side-effects,” said Cornelia Betsch, a researcher at the University of Erfurt in Germany who has written extensively about vaccine policy. “That leads us to overestimate the risks of vaccination, and underestimate the risks of the diseases.” At the same time, the underlying logic of vaccines seemed counterintuitive, said Eric Oliver, a political scientist at the University of Chicago. “Injecting septic substances into my body to prevent disease is not a natural idea,” he told AFP. Our brains can also be tricked into seeing causal links between rare events that, by coincidence, happen at the same time. “Many children are diagnosed with autism at the age of two — about the same age they get their MMR vaccines,” Oliver noted, using the abbreviation for measles, mumps and rubella. Add the “echo chamber” of the internet and social networks, and a perfect storm of mistrust begins to form. “Social media have rapidly become the main information source for many users,” said Walter Quattrociocchi, a researcher at the Laboratory of Computational Social Science in Lucca, Italy, who has studied the spread of fake news and conspiracy theories. Facebook now counts more than 2-billion monthly active users. When it comes to conspiracy theories, the tendency to gravitate towards what one already believes — known as “confirmation bias” — plays a crucial role. “Users happily embrace false information as long as it reinforces their preexisting beliefs,” Quattrociocchi said. The increasingly blurred boundary between verifiable fact and subjective assertion that defines what some call the “post-truth” era doesn’t help. Quattrociocchi cited a 2014 tweet from Donald Trump as a textbook example. Now president of the US, he wrote on Twitter then: “Healthy young child goes to doctor, gets pumped with massive shot of many vaccines, doesn’t feel good and changes — AUTISM. Many such cases!” He later tweeted that childhood vaccinations were acceptable, but not in “1 massive dose”. 

This entry was posted on Saturday, January 27th, 2018 at 9:35 am and is filed under Literature.

Videos Video archive

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Literature Literature archive

HC Maltezou, C Ledda, V Rapisarda 2019 Vaccine Vol 37(32): 4419-4658
Sabahelzain MM et al. 2019 PLoS ONE VOl 14 (6): e0213882.
KT Paul, K Loer 2019 Journal of Public Health Policy Volume 40, Issue 2
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