'Brain fog': the people struggling to think clearly months after Covid

Doctors grapple for answers as more patients report post-coronavirus cognitive impairment

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For Mirabai Nicholson-McKellar, Covid-19 brought an onslaught of symptoms from chest pains to an 11-day migraine, three positive test results, and a period in hospital.

Seven months later, the rollercoaster is far from over: the 36-year-old from Byron Bay, Australia is still experiencing symptoms - including difficulties with thinking that are often described as brain fog".