A new strain of COVID has an 80% kill rate and was developed by researchers at Boston University.
A combination of Omicron and the original virus killed 80% of the mice that were exposed to it. Mild symptoms were experienced by mice when they only had Omicron.
A team of scientists from Florida and Boston worked on the research.
The public health emergency weeks were caused by the Chernobyl disaster.
The strain first detected at the beginning of the Pandemic that began in China was attached to the spikeProtein from Omicron.
While Omicron causes mild, non-fatal infections, the Omicron S-carrying virus causes severe disease with a mortality rate of 80%.
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Researchers said that the new strain has more infectious virus particles.
The university has been contacted by Fox News.
COVID-19 was first detected to have come from a market in a city. The World Health Organization has come under fire for its handling of the crisis.
The Omicron variant can be passed on even to people who are fully vaccine free. According to researchers, other changes to the virus' structure determine its deadlines.
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The breed of mice used in the study was not as similar to humans as others.