#YellowFever

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).

Colombia has declared a nationwide health emergency after a sudden yellow fever outbreak. Officials report at least 34 deaths and 74 confirmed cases in 2025, signaling a sharp resurgence of a mosquito-borne illness in a region that had seen few cases in recent years. The response from the Colombian government underscores growing alarm and offers a cautionary lesson for Thailand, where Aedes-borne diseases are a constant concern.

Yellow fever is caused by a virus transmitted mainly by Aedes and Haemagogus mosquitoes. Early symptoms often resemble those of dengue or Zika, including fever, muscle pain, and headaches. In severe cases, the disease can cause jaundice, bleeding, and organ failure. Mortality can be high in the most serious phase, a reminder of why vaccination and vector control are critical. Health authorities have noted that vaccination is required for travelers to high-risk areas during Easter, as uptake becomes a focal point of the national campaign.

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.