David Strain is a doctor and lecturer at the University of Exeter. He has previously specialised in myalgic encephalomyelitis and chronic fatigue syndrome. In November, he himself fell ill with covid-19. It took him six weeks to regain enough energy to go back to work.
- It was difficult, I'm the kind of person who wants to get back to work as soon as possible," he tells SvD.
Now he can manage a normal working day, but can no longer exercise as before. He describes post-covid as having a low battery all the time.
- It never gets fully charged and for some people with postcovid, 15 minutes of activity can drain their energy completely.
David Strain still considers himself lucky. Many people with prolonged covid symptoms have it much worse than him. He has seen this at the clinic in the south-west of England where he and other therapists care for patients suffering from the condition.
- We don't yet know what postcoivd is. There are two or three different types. We have patients who were hospitalised and are recovering slowly. Then we have patients who were not very severely ill in covid-19, but who start having new symptoms two weeks or a month after they recover.
The symptoms affecting the second group are many and varied. Some are exhausted, others have what is called brain fog, some have severe pain, others have a high pulse.
- It seems to affect younger and healthy people more often, those who are not at risk of becoming seriously ill from covid-19. For them, it is a big deal to no longer be able to walk a mile when they used to be able to run a marathon.
There are many different theories about exactly what causes postcovid and now several research projects in the UK studying the disease. According to David Strain, the big challenge for doctors is that there is no map of how to treat postcovid.
- It's like chronic fatigue syndrome, where there hasn't been as much research as with other diseases. So we don't have the same tools as those who treat heart problems, for example.
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