Experts have hailed the study as a 'major breakthrough', according to the Daily Express.
Until we understand the cause, we cannot hope to find a cure. This is a major breakthrough which we hope will help us to unlock the genetic basis of the disease."
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The Democratic presidential candidate may also have shown his cards on his choice of running mate.
The US president also shared a post on Twitter accusing Dr Anthony Fauci of misleading the public over hydroxychloroquine.
Fears over an impending second wave of coronavirus dominates Wednesday’s front pages.