They are called the “long-haulers” – the millions of people around the world with Covid-19 who develop various symptoms after they recover from the original infection.
The severity varies, with more serious ones such as organ damage – including to the kidneys, lungs, pancreas and heart – raising the risk of death.Somewhere between two months and more than a year, according to the WHO. A US National Institutes of Health review published in March last year says that at least 10 per cent of people with Covid-19 experience at least one symptom for 12 weeks or longer.