Diseases like COVID-19 that jump from animals to people driven by habitat loss: UN report
Unsustainable agriculture practices, expansion of infrastructure and resource mining at the expense of wild spaces has severely limited our ability to prevent these diseases.
As per a new report from the United Nations, a class of diseases that jumps from animals and insects to humans – coronavirus disease (COVID-19) among them – are more likely to emerge as humankind continues to destroy habitats and wildlife. Unsustainable farming practices and climate change are also major factors that affect the spread of these diseases, the new report warns.
Apart from the coronavirus -causing SARS-CoV-2 virus, other pathogens that were responsible for these 'zoonotic diseases' in the past include infamous epidemic agents like Ebola, Middle East respiratory syndrome (MERS), HIV/AIDS and West Nile virus. The emergence of these diseases has increased hand-in-hand with stresses that have been placed on animal habitats by humankind, the UN Environment Program reports.
"We have intensified agriculture, expanded infrastructure and extracted resources at the expense of our wild spaces," Inger Andersen, Executive Director of UNEP was quoted as saying in the report.
"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."
Andersen adds that more investment in the study of zoonotic diseases can help the world get "ahead of the game" and help in "preventing the type of global shutdown" caused by the likes of the COVID-19 pandemic in the future.
The report also offers a set of practical recommendations that can help policymakers prevent and respond to future disease outbreaks. It calls on governments to consider adopting a coordinated "One Health" approach that coordinates the efforts of public health, veterinary and environmental experts in combating zoonotic disease outbreaks.
"People look back to the influenza pandemic of 1918–1919 and think that such disease outbreaks only happen once in a century," said 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."
One of the other key drivers exacerbating the problem, according to Anderson, is the global demand for animal meat, which has seen a 260 percent increase in the past 50 years. 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.
In some of the world's most economically poor regions, endemic diseases of a zoonotic nature are linked with livestock. These result in over 2 million human deaths a year, as per the UNEP report.
However, Africa, which has successfully responded to a number of zoonotic epidemics, like Ebola, could be a place to turn for solutions to controlling outbreaks of human-to-animal diseases in the future, it says.
In an earlier UN press briefing, the agency's Secretary-General António Guterres had said, "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."
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