Symptoms of Corona virus (COVID-19) are variable, ranging from mild symptoms to severe illness. Common symptoms include headache, loss of smell and taste, nasal congestion and runny nose, cough, muscle pain, sore throat, fewer, diarrhea and breathing difficulties. People with same infection may have different symptoms and their symptoms change over time. The common clusters of symptoms have been identified : One respiratory system cluster with cough, sputum, shortness of breath and fever, a musculoskeletal symptom cluster with muscle and joint pain; headache and fatigue; and a cluster of digestive systems and abdominal pain, vomiting and diarrhea. In people without prior ear, nose and throat disorders, loss of taste combined with loss of smell is associated with COVID-19.
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Most people recover from acute phase of disease. However, some people - over half of cohort of home-isolated with young patients - continue to experience a range of effects such as fatigue after a month of recovery, a condition called long COVID, long-term damage to organs have been observed. Multi-year are underway to further investigate the long-term effects of the disease.
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