As MPs are warned that up to half a million Britons are suffering coronavirus symptoms months after first falling ill, Theodora Louloudis hears from those experiencing 'long Covid' and speaks to Professor Tim Spector, a leading King's College London epidemiologist about why some suffer for much longer than others, and whether those experiencing long-term symptoms still have the disease. Read more about safety concerns over 50 million NHS masks: https://bit.ly/3ifB0l0 Read more about rising cases in Germany and France: https://bit.ly/3fwWhVh Read more about the new coronavirus rules for weddings: https://bit.ly/2DEPITC For 30 days' free access to The Telegraph: https://www.telegraph.co.uk/audio Email: [email protected]