#MMR

Alarming trends in American childhood vaccination rates serve as a critical warning for Thailand’s public health system, as declining immunization coverage and soaring parental exemptions threaten to unravel decades of disease prevention success. Recent data from the U.S. Centers for Disease Control and Prevention reveals a dangerous erosion of herd immunity that carries profound implications for Thailand’s own vaccination programs, particularly as the kingdom balances traditional values with modern medical science while confronting rising vaccine hesitancy in certain communities.

Vaccination rates among U.S. kindergarteners have fallen while exemption rates have soared to unprecedented levels, sparking renewed concerns about resurgent vaccine-preventable diseases—a trend with implications far beyond American borders. New data from the U.S. Centers for Disease Control and Prevention (CDC), released in early August 2025, show that inoculation coverage for key childhood diseases has declined again. At the same time, exemptions—parents opting out of required vaccines for their children—have reached an all-time high. The latest snapshot underscores potential threats to herd immunity, with infectious diseases like measles re-emerging at levels not seen in more than 30 years in the United States. The findings highlight not only the direct health risks but also wider social and policy challenges as vaccine hesitancy grows worldwide, including in Thailand.

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.

Three more US states—Louisiana, Virginia, and Missouri—confirmed their first measles cases of 2025 over the weekend, pushing the current outbreak to over half of all US states and marking one of the most significant resurgences in recent years. According to a report by UPI, the total number of confirmed cases across at least 27 states has climbed to 800, with the vast majority being either unvaccinated or of unknown vaccination status. This growing crisis reflects deeper global trends in vaccine coverage and highlights crucial public health lessons for Thailand, where measles cases have also risen sharply over the last two years (UPI, CDC).