Science There are now two types of coroanvirus, one which is more aggressive | Credit: AFP Live coronavirus Q&A: Covid-19 has mutated - what happens now? Put your questions to our Science Editor Coronavirus has mutated into two strains, one which appears to be far more aggressive, scientists have said, in a discovery which could hinder attempts to develop a vaccine. Researchers at Peking University's School of Life Sciences and the Institut Pasteur of Shanghai, discovered the virus has evolved
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