“…Also, several symptom related classifications are found in the literature terms of ( Table 3 ): asymptomatic/pauci-symptomatic athletes and athletes with ‘mild’ diseases (anosmia, ageusia, headache, sore throat, fever, cough, malaise, mild upper respiratory tract illness, mild gastrointestinal illness); athletes with ‘moderate’ disease or athletes needing hospitalization (persistent fever, chills, myalgia, lethargy, dyspnoea, chest pain, chest tightness); athletes with ‘severe’ and/or ‘critical’ disease (respiratory failure, pneumonia, shock and multiorgan failure). 54 , 87 , 97 According to works considering extended versions of the symptom classification provided by the National Institute of Health (USA), main symptom clusters are as follows ( Table 3 ): Post-acute COVID syndrome (PACS) for persistent symptoms after 3 weeks; Chronic COVID after 12 weeks; Long COVID or Post-Acute Sequelae of SARS-CoV-2 (PASC); Postural tachycardia syndrome (POTS). 47 , 54 , 79 , 84 , 98 , 99 Other studies, instead, consider ‘above neck symptoms’ such as runny/blocked nose or a tickly throat, coughing, sneezing, a sore throat; and ‘below neck symptoms’ such as: high temperature, tight chest, persistent cough, nausea, vomiting, palpitations, malaise, diarrhoea, dyspnoea, muscle aches, joint pains, swollen lymph nodes 8 , 17 , 69 , 96 , 100 , 101 , 102 ( Table 3 ).…”