#InfectiousDiseases

A sweeping new international study has found that emergency vaccination programmes launched to counter outbreaks of Ebola, measles, cholera, yellow fever, and meningitis have slashed global deaths and infections from these deadly diseases by nearly 60% over the last 23 years. Researchers say the impact does not stop with lives saved—swift vaccine deployment has yielded economic savings estimated at billions of dollars, marking vaccines as not only a public health triumph but also a cost-effective shield against disruptive epidemics (BBC News).

In a sobering assessment this week, a leading US infectious disease expert declared that the world may have moved into a “post-herd immunity” era for measles, as vaccination gaps spark resurgent outbreaks across multiple countries. The statement comes as the United States faces its worst measles outbreak in decades, with more than 930 cases reported this year alone—a harbinger that the protective barrier of community immunity is crumbling (The Guardian, MSN).

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 recent story making international headlines details how a man developed a severe skin condition after wearing unwashed thrifted clothing, sparking new concern over the health risks associated with second-hand fashion. This case has resonated with Thai consumers as the popularity of second-hand shops continues to grow amid economic uncertainty and a burgeoning sustainability movement.

According to the New York Post, the individual reportedly began experiencing serious dermatological symptoms, including intense itching, a rash, and swelling, shortly after donning garments bought from a thrift store. Subsequent medical examination confirmed the presence of a transmissible skin infection attributed to pathogens remaining on pre-owned clothes. The precise diagnosis was not disclosed, but experts often cite risks such as scabies, fungi, or bacterial infections in similar cases.

A recent discovery in Greenville, North Carolina has put public health surveillance techniques in the spotlight: wastewater samples from a local sewage plant have tested positive for Mpox, the virus formerly known as monkeypox, specifically identifying the clade I strain. The samples, collected between late March and early April, point to the potential presence of the virus in the community, even though no clinical Mpox cases have been officially reported so far. Local health officials are now urging healthcare providers to be vigilant for possible symptoms and to quickly report any suspected infections (WRAL; ABC11).

As the annual tick season approaches in North America, a rare but dangerous virus is attracting mounting attention: Powassan virus. While this tick-borne illness remains uncommon, recent research and rising case reports point to growing concerns that reverberate beyond Western borders—and carry valuable warnings for Thailand as well.

Powassan virus, primarily transmitted by blacklegged ticks, has been recognized as one of the most serious tick-borne diseases in the United States, despite its rarity. Last year, Minnesota reported a record 14 cases, the highest count since 2008 when official recordkeeping began. According to Minnesota Department of Health data, while most years saw fewer than five cases, a slow but concerning uptick has prompted both local and national action. “The risks are relatively low, however, all the tick prevention that you would do to keep yourself from getting one of those more common diseases will also help keep you safe from getting Powassan,” Elizabeth Schiffman, an epidemiologist supervisor at the Minnesota Department of Health, emphasized in a recent interview (Star Tribune).

Colombia has declared a nationwide health emergency following a sudden and deadly outbreak of yellow fever, with at least 34 deaths and 74 confirmed cases reported so far in 2025, according to official Colombian health authorities (BBC; Reuters). The government’s urgent response underscores growing alarm about the re-emergence of this mosquito-borne virus in a region that had seen virtually no cases in recent years—a trend that should serve as a wake-up call for countries like Thailand, also home to mosquito-borne diseases.

The specter of polio, a disease once on the brink of global eradication, is looming large yet again as new reports from 2025 reveal troubling spikes in Afghanistan and Pakistan, compounded by global aid disruptions and vaccine skepticism1. For Thai readers, these developments sound an urgent warning: even diseases thought to be “conquered” can return if public health vigilance lapses, offering a stark lesson relevant to Thailand’s ongoing immunization efforts and pandemic preparedness.

A recent study published in the Journal of the American Medical Association has raised alarms over the increasing prevalence of invasive Group A Streptococcus (GAS) infections, more infamously known as the flesh-eating disease, across ten states in the United States. This extensive research, covering around 35 million people over a decade, reports a worrying trend with cases doubling since 2022. For Thai readers, understanding the nature of this disease and its potential implications is crucial in a globally connected world where diseases can swiftly cross borders.

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.