Historically, certain diseases have been restricted to specific regions, thriving only in climates conducive to their spread. A notable example includes mosquito-borne illnesses like dengue fever, which flourish mainly in areas with suitable temperature and rainfall that support both mosquito breeding and disease proliferation.
However, with rising global temperatures due to pollution, many more places are beginning to meet these favorable conditions. As a result, dengue fever is becoming an increasingly serious issue, according to a new study highlighted by the Stanford Report.
What’s happening?
This study involved researchers from institutions such as Stanford, Harvard, Arizona State University, and the National Bureau of Economic Research, and was published in the Proceedings of the National Academy of Sciences.
The researchers analyzed how much rising temperatures could increase dengue fever cases in the future, as well as the extent of the rise that has already occurred.
Lead author Marissa Childs, an assistant professor of environmental health at the University of Washington, expressed surprise at the impact of temperature changes. “Even small shifts in temperature can have a big impact for dengue transmission, and we’re already seeing the fingerprint of climate warming,” she noted.
What is that fingerprint, exactly? After looking at 1.4 million dengue cases across 21 countries, it was found that climate change contributes to around 4.6 million additional cases each year, marking an 18% increase. Projections suggest this could rise an additional 49% to 76% by 2050.
Why is this result important?
Dengue fever, sometimes referred to as “breakbone fever,” can be extremely painful and—when severe—may even lead to death. Those who’ve had it once are at an increased risk for more severe cases if they contract it again. As temperatures rise, a growing number of individuals who have never encountered this illness before now find themselves at risk, resulting in confirmed fatalities.
This isn’t just a potential problem for the future; significant suffering has already occurred due to the increased transmission linked to warming. Senior author Erin Mordecai, a biology professor at Stanford, emphasized that climate change’s effects extend beyond weather alterations, leading to significant consequences for human health, such as enhanced disease transmission by mosquitoes.
What’s being done about dengue fever transmission?
Advancements in vaccination research show promise for curbing the worldwide spread of dengue fever. Additionally, some local governments are taking measures to control mosquito populations to limit disease transmission.
Still, the only sustainable approach to the broader issue of diseases that spread quickly in warmer climates lies in tackling air pollution to help lower the Earth’s temperature.
