What are the symptoms of long Covid?
A 2021 research study led by Imperial College London identified two main categories of ongoing symptoms linked to the condition.
Of the 500,000 people who took part, the study found that a smaller group of people presented respiratory symptoms, such as a cough or breathlessness, and were more likely to have had severe COVID-19 illness while infected.
A larger group presented a cluster of more general symptoms, particularly tiredness and fatigue.
Further research by the Zoe Covid symptoms app also identified these two main groups of long term symptoms, though key organs – such as the heart, brain, and gut – were noticeably affected in the “generic” group.
Fatigue and headaches were more common in the “respiratory” group.