The model from the Institute for Health Metrics and Evaluation (IHME) at the University of Washington’s School of Medicine proved influential in guiding America’s coronavirus task force earlier this year.
Now its predictions – which some have criticised for looking too far into the future – have suggested the total death toll for the virus could stand at 2.8 million by 1 January 2021 unless governments reconsider easing measures designed to mitigate the spread of Sars-Cov-2, the virus which causes Covid-19.
“These first ever worldwide projections by country offer a daunting forecast as well as a roadmap towards relief from Covid-19 that government leaders as well as individuals can follow,” said IHME director Dr Christopher Murray.
“We are facing the prospect of a deadly December, especially in Europe, central Asia, and the United States. But the science is clear and the evidence irrefutable: mask-wearing, social-distancing, and limits to social gatherings are vital to helping prevent transmission of the virus.”
The institute’s projection of 1.9 million additional deaths was based on its “most likely” scenario – which assumes individual mask wearing and other mitigation measures remain unchanged.
Of those, 38,000 were predicted to come from the UK, while India, the US and Brazil would see the most total death.
However, researchers also modelled for a worst and best case scenario which resulted in a difference of 2 million additional deaths worldwide.
In the “best case” modelling predicted what would happen if mask wearing was almost universal and if governments imposed greater social distancing measures if their daily death rate rose above eight fatalities per million people.
In that instance global fatalities would reach 2 million globally. In a “worst case” scenario, where mask usage stays at current rates and governments continue relaxing social distancing requirements it was suggested deaths could reach 4 million.
Dr Murray said there was still time to act to mitigate the spread of the virus – while warning that there was “tremendous amount of Covid fatigue” among the world’s government leaders because of economic downturns.
He added that respiratory illnesses tend to peak in winter months, a seasonal effect expected to hold true for Covid-19, Murray said Friday.
Jeffrey Shaman, an infectious-disease expert from Columbia University, told the Washington Post: “Beyond that, it’s all conjecture and guesswork because there are so many factors we just can’t predict and factors about transmission that truthfully scientists don’t understand very well yet,”
He added: “What happens the next few months really depends on what we do as a society the next few weeks.”
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