In a shocking turnabout, a 1998 study falsely claimed a connection between the measles-mumps-rubella (MMR) vaccine and autism. I was astounded by the study’s poor quality, its acceptance by a prestigious journal, and the lack of critical reporting by journalists. At that time, I was unaware that the research was fraudulent.

Nearly three decades later, the repercussions of these misleading claims still echo globally. The World Health Organization (WHO) reports that six countries, including the UK (for the second time), Spain, and Austria, have lost their measles-free status. This decline in vaccination rates has been significantly influenced by an anti-vaccination movement propagated by that erroneous paper. Meanwhile, the United States faces its worst outbreak in decades and would have also lost its measles-free status had it not withdrawn from the WHO.

Measles is one of the most contagious viruses on the planet, causing severe complications in around 1 in 5 children. Complications may lead to lasting brain damage, respiratory issues, hearing loss, blindness, and brain swelling. The WHO estimates that approximately 95,000 people may succumb to measles in 2024.

The actual impact extends further, as measles also destroys immune cells that help protect against other infections, diminishing immunity for around five years. It is a risk not worth taking.

Fortunately, measles has specific vulnerabilities. The virus first targets immune cells, travels to lymph nodes, and then disseminates throughout the body. This complex pathway enhances the immune system’s ability to combat the virus before it fully establishes an infection, unlike respiratory viruses that primarily attack cells in the nose and throat.

This is why the measles component in the MMR vaccine is highly effective. Countless studies confirm that vaccinated children are significantly better off, with no established link to autism. One compelling observation is that when the MMR vaccine was withdrawn in Japan, autism rates remained unchanged.

To maintain herd immunity, at least 95% of children must be vaccinated to ensure that each infected individual transmits the virus to fewer than one other person. This means that a small percentage of unvaccinated children can precipitate another outbreak of measles.

Globally, vaccination rates are improving, but there is still room for growth. The percentage of children receiving the first dose of the measles vaccine increased from 71% in 2000 to 84% in 2010. Despite a slight decline during the COVID-19 pandemic, the rates have rebounded. The WHO estimates that between 2000 and 2024, measles vaccination has prevented an impressive 60 million deaths worldwide, marking a significant victory.

However, in high-income nations, progress is stalling. After the erroneous claims of 1998, MMR vaccination levels fell to only 80% in England and Wales. By 2013, intake rates exceeded 90% but have been gradually decreasing since then. A recent report indicated that this decline in the UK is partly because access to vaccinations is becoming increasingly difficult for parents, a concern that warrants urgent attention.

Additionally, the resurgence of anti-vaccine sentiments is contributing to these challenges, closely linked to right-wing extremism as propagated on specific social media platforms. A quick search for “MMR measles” on Bluesky yielded no anti-vaccine posts in the top results, while the search on X surfaced a plethora of misleading anti-vaccine rhetoric.

Combatting this misinformation is a considerable challenge, especially when high-profile individuals on social media platforms align with disinformation, such as a certain billionaire collaborating with a known liar leading the world’s wealthiest nation and appointing an anti-vaxxer as health secretary.

What’s evident is that this crisis extends beyond vaccines; it’s crucial in areas like climate science where misinformation clouds the truth. Governments throughout Europe and beyond must take decisive action to regulate the infosphere, promote scientific integrity, and silence charlatans. The future of humanity is at stake.