Photo credit: Shutterstock
Vaccination rates are falling at an alarming pace across the globe – a trend that poses a serious threat to public health and the collective progress achieved over decades. Much of this decline can be traced back to the 1990s, when Dr Andrew Wakefield published his now-infamous paper claiming a link between the MMR vaccine and autism.
Although the paper was swiftly discredited, retracted by The Lancet, and Wakefield himself was struck off the medical register, the damage was already done. His false claims ignited widespread fear and mistrust that still echo through society today, fuelled further by social media disinformation and the rise of online conspiracy movements.
In the decades since, the anti-vaccination movement has evolved from a fringe sentiment into a global phenomenon, often masking itself under the banner of “personal choice” or “medical freedom.” Yet the consequences of these choices extend far beyond the individual. When too many opt out of vaccination, the entire population becomes vulnerable – particularly infants, the elderly, and the immunocompromised who rely on herd immunity for protection.
The United Kingdom has become a worrying example of this problem. According to the latest Henry Jackson Society report, the UK is now the worst-performing G7 country for measles vaccination coverage, having experienced multiple outbreaks in recent years. Public health experts are unequivocal: these outbreaks are a direct result of insufficient immunisation levels. The country has remained below the herd immunity threshold of 95% for some time – leaving communities exposed to diseases that were once thought eradicated.
As the Henry Jackson Society’s latest findings show, the situation has only worsened in the aftermath of the Covid-19 pandemic, when vaccine disinformation spiralled out of control. Not only was the Covid jab subjected to a barrage of falsehoods and conspiracy theories online, but these narratives soon spilled over to other vaccines – including MMR.
While a direct causal link between online disinformation and declining vaccination rates cannot yet be proven, the data points to a strong correlation. It is reasonable to assume that when parents are continually bombarded with misleading content questioning vaccine safety, some will hesitate. This effect is exacerbated by the lack of opportunities for meaningful engagement with doctors and trusted medical professionals who could counter the flood of online disinformation.
Perhaps the most troubling revelation in our report is that even younger generations – digital natives supposedly better equipped to navigate the online world – are not immune to disinformation. Contrary to expectations, they too are falling prey to misleading content. Alarmingly, 60.2% of our respondents said they had encountered negative commentary about the Covid-19 vaccine online, and nearly a quarter admitted choosing not to receive it. Of those who refused the Covid-19 jab, 44% cited safety concerns – the very talking points amplified by online conspiracy networks.
What is even more concerning is that these fears now extend to childhood vaccines such as MMR. More than 60% of respondents said they would feel very or somewhat concerned about giving the MMR jab to their children. Should even half of them act on that hesitation, the UK’s vaccination rate could plummet to around 70% in the coming years – a catastrophic 25% below the level required for herd immunity.
The data paints a sobering picture: disinformation is not just an online nuisance – it is a public health crisis. The erosion of trust in science and medicine has tangible, dangerous consequences. Combating this challenge will require more than fact-checking or punitive regulation; it demands a coordinated effort to rebuild trust through clear communication, community outreach, and transparent policymaking. Vaccines remain one of humanity’s greatest scientific achievements – but their success depends on our collective willingness to defend truth over falsehood, and to protect not only ourselves, but one another.
- Dr Helena Ivanov is an Associate Research Fellow at The Henry Jackson Society
