The study – which is yet to be peer reviewed – identified six clusters of symptoms which represent six types of Covid-19.

These clusters become progressively more severe, starting from having flu-like symptoms with no fever to having a fever followed by also suffering from diarrhoea.

There are then three ‘severe’ clusters – the first causes fatigue, the second confusion and the final one causes abdominal and respiratory issues…

They developed a model to predict which cluster a patient falls into and their risk of hospitalisation based on their age, sex, body mass index and pre-existing conditions.