Long Covid: what we know so far

Lasting symptoms may not be down to a single syndrome but several different ones

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At the start of the pandemic we were told that Covid-19 was a respiratory illness from which most people would recover within two or three weeks, but it's increasingly clear that there may be tens of thousands of people, if not hundreds of thousands, who have been left experiencing symptoms months after becoming infected.

Now, the National Institute for Health Research (NIHR) has released a report which suggests that long Covid" may not be a single syndrome, but up to four different ones, which some patients might be experiencing simultaneously. Here's what we now know: