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Post-COVID-19 sequelae-issue which remain unanswered

COVID-19 is known to involve multiple organs and physiological systems in all age group humans. There are a growing number of patients worldwide who have survived COVID-19 but continue to battle the symptoms of the illness, long after they have clinically tested negative for the disease. This narrative review summarizes current clinical evidence regarding post COVID health issue specially post COVID pulmonary fibrosis, post COVID thrombosis, post COVID syndrome, and post COVID ICU syndrome. Many aspects regarding post COVID sequelae remain answered, necessitate hot area for research.