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 NHS is launching Your Covid Recovery for people suffering with the long-term physical and mental impacts of the virus.
Sir Keir Starmer made the comments as the nation was urged to show support for the health service by lighting candles in its honour.
Researchers in Bristol developed the drainage, irrigation and fibrinolytic therapy technique in 1998 and it was first trialled in 2003.