NHS have shared an updated list of symptoms as headaches and diarrhoea are identified as Covid calling cards.Many symptoms are similar to those that you may experience with the flu or a cold, including a high temperature and chills, a continuous cough and a sore throat.The news comes as it was announced that a record 4.9 million people have the virus in the UK, and that figure could rise further over the coming weeks.The Office for National Statistics (ONS) officials say that is the highest number seen since its survey began at the end of April 2020, and that the surge in infections is being driven partly by the contagious Omicron BA.2 sub-variant and the fact that restrictions have been essentially eradicated.The main symptoms of Covid are still the same: a high temperature, a new, continuous cough and a loss or change to your sense of smell or taste.However as new strains emerge and the virus develops, other symptoms have also been reported to be linked with the sickness.According to the NHS the signs of COVID-19 that people should look out for also include:A note on the NHS website adds: "The symptoms are very similar to symptoms of other illnesses, such as colds and flu."The NHS list had just three symptoms for almost two years, this is despite the World Health Organization (WHO) and the Centres for Disease Control and Prevention (CDC) in the US having had longer symptom lists for some time."Why now make that change when it's been stuck on just the three for so long?" Kate Garraway asked Dr Hilary on GMB today (Monday, April 4). To stay up to date with all the latest news, make sure you sign up to one of our newsletters here .