If you think the health care sector doesn’t need to worry about climate change, think again—and get ready for an onslaught of infectious disease outbreaks.
By the numbers: 58% of pathogenic diseases “have been at some point aggravated by climatic hazards,” found a recent study. More than 1,000 unique pathways allowed climate change to increase infectious diseases, and aggravate non-infectious diseases, too.
Take deadly antimicrobial-resistant fungi, which, according to the WHO, are increasing in “incidence and geographic range” as fungi adapt to higher temperatures—same as bacteria.
Or Lyme disease, which has seen a 357% increase in prevalence in rural areas between 2007 and 2021, along with a 65% growth of infections in urban areas, due to warming temperatures and more ticks.
Or dengue, which affects half the world’s population and kills some 20,000 (mostly children) per year, with numbers expected to rise due to the increase in mosquitoes.
Here’s why: “As the planet heats up, animals big and small, on land and in the sea, are headed to the poles to get out of the heat. That means animals are coming into contact with other animals they normally wouldn’t, and that creates an opportunity for pathogens to get into new hosts,” said Harvard researchers about the role of climate change in the spread of COVID-19.
What we need to do: “The human pathogenic diseases and transmission pathways aggravated by climatic hazards are too numerous for comprehensive societal adaptations, highlighting the urgent need to work at the source of the problem: reducing GHG emissions,” found the researchers at the University of Hawaii.
(Better news: biotech can help.)
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