Recent studies have claimed digestive issues, such as diarrhoea, could also be a symptom.
However, the World Health Organisation have stated that very few people will report diarrhoea, nausea or a runny nose.
Fortunately, Simon updated fans on his condition this morning and said he feels “tonnes better”.
He penned: “Thanks twiiterford for all the kind messages feel tonnes better today xx
“Heart goes out to all the people who have suffered so much more. Stay safe.”(sic)