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A new United Nations report warns that more diseases that pass from animals to humans, such as COVID-19, are likely to emerge as habitats are ravaged by wildlife exploitation, unsustainable farming practices and climate change.

These pathogens, known as zoonotic diseases, also include Ebola, MERS, HIV/AIDS and West Nile virus. They have increasingly emerged due to stresses humans have placed on animal habitats, according to the U.N. Environment Program report 

Preventing the Next Pandemic: Zoonotic diseases and how to break the chain of transmission

"We have intensified agriculture, expanded infrastructure and extracted resources at the expense of our wild spaces," UNEP executive director Inger Andersen 

 "The science is clear that if we keep exploiting wildlife and destroying our ecosystems, then we can expect to see a steady stream of these diseases jumping from animals to humans in the years ahead."

The worrisome link between deforestation and disease

Andersen said that investing in research of zoonotic diseases would allow the world to get "ahead of the game ... preventing the type of global shutdown we've seen."

The new report recommends that governments adopt a coordinated "One Health" approach pulling together public health, veterinary and environmental experts to combat these outbreaks of zoonotic diseases.

"People look back to the influenza pandemic of 1918–1919 and think that such disease outbreaks only happen once in a century," 

Maarten Kappelle, the head of scientific assessments at UNEP. "But that's no longer true. If we don't restore the balance between the natural world and the human one, these outbreaks will become increasingly prevalent."

Global demand for animal meat has increased 260 percent in the last half century, exacerbating the problem, 

Some animals, such as rodents, bats, carnivores and nonhuman primates, are most likely to harbor zoonotic diseases, with livestock acting as a bridge for transmission between the animal hosts and humans, according to the report.

Meanwhile, in some of the world's poorest regions, endemic zoonotic diseases associated with livestock cause more than 2 million human deaths a year, the report says. However, Africa, which has successfully responded to a number of zoonotic epidemics, such as Ebola, could be a place to turn for solutions to controlling outbreaks of human-to-animal diseases in the future, it says.

"To prevent future outbreaks, countries need to conserve wild habitats, promote sustainable agriculture, strengthen food safety standards, monitor and regulate food markets, invest in technology to identify risks, and curb the illegal trade in wildlife,"

U.N. Secretary-General António Guterres said.   

Environmental News

Health

COVID-19

Scott Neuman

Author

Zoonotic pathogens, which include not only COVID-19, but HIV/AIDS and Ebola, have increasingly emerged due to stresses humans have placed on animal habitats, according to a new United Nations report.

UN predicts rise in diseases that jump from animals to humans

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