#Immunization

A sweeping new study out of Denmark has concluded that exposure to aluminum in early childhood vaccines does not increase the risk for autism spectrum disorder (ASD), attention-deficit/hyperactivity disorder (ADHD), or other chronic neurological, autoimmune, or allergic conditions. This research, covering more than 1.2 million children, comes at a crucial time of persistent vaccine hesitancy and misinformation, offering robust scientific reassurances that routine childhood immunisations are safe and not a source of neurological or immune harm.

South Asia has achieved a remarkable public health milestone in 2024, reaching its highest-ever immunization coverage for children, according to newly released data from the World Health Organization (WHO) and UNICEF. The news marks a turning point not only for the region but also offers valuable lessons for countries like Thailand as they strive to strengthen child health and protection against vaccine-preventable diseases.

At the heart of this achievement lies a powerful collaboration between governments, frontline health workers, international donors, and the communities themselves. Early results released by WHO Thailand on July 16, 2025, highlight the collective push across South Asia – which includes Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, and Sri Lanka – that led to a dramatic increase in vaccine coverage. According to UNICEF’s Regional Director for South Asia, “This is a proud moment for South Asia. More children are protected today than ever before, thanks to tireless frontline health workers, strong government leadership, donors’ and partners’ support and the unwavering trust of families.”

A growing body of research reveals that vaccines may deliver far more than protection against specific infectious diseases; they can also trigger broader immune system responses that benefit general health and survival, especially among children. These “non-specific effects”—sometimes called “bonus shots”—recently made headlines in a detailed feature on Salon.com, which highlighted a wave of new scientific findings and renewed international debate. For Thailand, where high childhood immunisation rates have underpinned rising life expectancies for decades, these revelations add new urgency and context to national vaccine policy.

A federal advisory committee to the US Centers for Disease Control and Prevention (CDC) has recommended that all Americans—including children, pregnant women, and adults—receive single-dose influenza vaccines that do not contain thimerosal, a mercury-based preservative long scrutinized despite decades of safe use. This move, which could soon lead to an official CDC policy, reflects an ongoing international spotlight on vaccine ingredients and the public’s persistent concern over vaccine safety—a topic with direct relevance for Thailand’s immunization practices and public confidence.

A recent vote by a United States government advisory panel to curtail the use of thimerosal—a mercury-based preservative—in flu vaccines has reignited controversy over vaccine safety and the legacy of discredited autism claims. The vote, which followed a presentation by prominent vaccine critics now serving in government, illustrates how decades-old debates over vaccine ingredients continue to influence public health policy, even as the global consensus remains firm on vaccine safety.

A new comprehensive study published in The Lancet has sounded a worldwide alarm: after five decades of progress, childhood vaccination coverage is stagnating or even retreating, leaving millions of children increasingly vulnerable to deadly yet preventable diseases. The analysis, released this week and drawing on 50 years of country-level data, warns that the number of “zero-dose” children—those missing even the most basic vaccines—remains distressingly high, with global immunisation efforts hampered by growing inequalities, the lasting shocks of the COVID-19 pandemic, and an upsurge in vaccine hesitancy and misinformation (Washington Post; The Lancet).

The alarming drop in childhood vaccination rates is raising fresh fears of infectious disease resurgence in Thailand and around the world. According to recent research highlighted by international health experts, the downward trend in routine immunizations is leaving populations increasingly vulnerable to outbreaks of preventable illnesses such as measles and polio, marking a pivotal moment for public health systems globally, including Thailand (WIRED).

This issue is especially crucial for Thai families and policymakers in the wake of the Covid-19 pandemic, which disrupted health services and shifted public attention away from routine childhood immunizations. Historically, Thailand has celebrated strong immunization coverage, credited with eradicating diseases such as polio within its borders and sharply reducing cases of measles and diphtheria. However, the latest developments suggest these hard-won gains may now be at risk should the pattern mirror the global decline.

A groundbreaking U.S. government study has found that a single dose of the human papillomavirus (HPV) vaccine may be just as effective at preventing HPV infection as the traditional two-dose regimen, according to new data presented this week. The findings could dramatically reshape vaccination strategies worldwide, including policies and practices in Thailand, where increasing HPV vaccine uptake remains a crucial public health goal.

The new results, unveiled by U.S. government researchers, have been described by experts as “phenomenal,” underscoring the potential for a single-dose schedule to maintain protection against the most common and cancer-causing strains of HPV. The research, detailed in a highly anticipated STAT News report, adds to growing evidence that simplifying the HPV vaccine protocol could enhance global vaccination rates, lower health care costs, and ultimately save more lives.

A recent case in the United States is raising alarm among health experts worldwide—including here in Thailand—after a controversial physician contracted measles yet continued to practice medicine, treating children who were never vaccinated against the highly infectious disease. The case, originally reported by Ars Technica, underscored the troubling intersection of vaccine hesitancy and public health, as well as the ongoing risks posed by declining immunization rates among children.

The incident involved an American doctor known for her opposition to vaccine mandates, who was diagnosed with measles after caring for unvaccinated pediatric patients during a local outbreak. Despite clear recommendations from health authorities that infected individuals remain isolated to avoid further transmission, the doctor allegedly kept treating her young patients—many of whom were especially vulnerable to the virus due to their unvaccinated status (source).

The US state of Virginia has reported its first confirmed measles case for 2025, raising fresh concerns about the resurgence of vaccine-preventable diseases. Health officials at the Virginia Department of Health announced the case on 19 April 2025, emphasizing the critical need to maintain high immunization rates. This news is not only significant for Americans, but offers urgent lessons for Thai families and healthcare providers in an era marked by global travel, vaccine hesitancy, and infectious disease risks.

A small American town’s resistance to childhood vaccinations has turned into an international public health warning, as a measles outbreak sweeps through the community, resulting in the deaths of at least two children and serious illness for many more Mirror, Apr 15, 2025. The outbreak inundated local hospitals, rekindled global debates about vaccine misinformation, and now stands as a sobering lesson for countries like Thailand, where vaccine confidence is increasingly challenged by online conspiracy theories and social media rumors.

The threat of measles is looming larger than ever with rising unvaccination rates posing significant public health risks worldwide. An enlightening report by The New York Times describes the grim reality of measles infection, specifically targeting unvaccinated children. Given the highly infectious nature of this virus, the findings are particularly poignant for Thailand, where vaccination campaigns have been critical in the past.

Measles, known as one of the most infectious viruses globally, requires no direct contact to spread. A simple stroll through a room where an infected individual was present could lead to transmission through inhaled droplets. The report highlighted that 90% of unvaccinated individuals exposed to measles will contract it. For Thailand, where public spaces such as markets and schools are pivotal in daily life, understanding this transmission dynamic is crucial in preventing outbreaks.