Covid-19, Sars, swine flu, Mers, and Ebola have all appeared since the start of the century.

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The coronavirus pandemic has devastated many lives and the global economy but it’s not the first time a virus has threatened the world. Hundreds of viruses with the potential to infect humans have already been found in animals and scientists are watching new strains of influenza closely. Can we afford to ignore these threats?

Watch more videos about the science of Covid-19 here:    • The science of Covid-19  

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