Covid-19 sufferers have continued to suffer from fatigue, breathlessness and forgetfulness more than 100 days after contracting the bug.
Many coronavirus survivors have described how they still feel unwell months after they tested positive.
Louise Nicholls, from Litherland in Liverpool, is one of those people who found themselves suffering from a range of symptoms long after her health should have returned to normal, the Liverpool Echo reports.
She was told she had coronavirus by her doctor on April 1 having gone in search of medical help after suffering from a number of respiratory symptoms.
Before she fell ill, the 32-year-old was in "really good health", lifting weights three times a week and going horse riding, in preparation for her wedding.
Louise said: "I was trying to do my workouts and I was getting really short of breath. I couldn't put my finger on what was going on but it got worse every day. My chest started getting tighter and my lungs were burning."
Louise's breathing continued to get worse and she was given a steroid inhaler, which she is still taking today.
She said: "I couldn't even close my eyes to go to sleep because my body would forget to breathe because it was that hard.
"I would stay up until 4am not being able to breathe. That's when I rang 111 and they gave me some steroid tablets to bring down the inflammation."
Louise feels much better than she did - but she is still struggling with her breathing and is continuing to use an inhaler.
Professor Paul Garner has suffered symptoms of Covid-19, 100 days after contracting it.
The Liverpool School of Tropical Medicine epidemiologist said he was fit and healthy before he contracted the virus, doing yoga and running between 30 and 40km a week.
But now, even a 15-minute bike ride can leave Paul bed bound for 24 hours.
He said: "It's a mind-boggling condition, it really is.
"The main problem for me has been this horrible fatigue, it's much like chronic fatigue syndrome but it's not getting to that yet.
"I am unable to be out of bed for more than three hours at a stretch. My arms and legs are permanently fizzing as if injected with Szechuan peppercorns, I have ringing in the ears, intermittent brain fog, palpitations, and dramatic mood swings.
"I get aches and pains in my muscles and pins and needles in my arms and legs. This disease really gives your body a pummelling and bashes you around inside."
