Global public health is facing great challenges due to the infection caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) and its mutated strains. Although we have entered the post-pandemic era, a new crisis is the long-term effects of SARS-CoV-2 infection, which can involve multiple organs, mainly manifested by pulmonary, neuropsychiatric, cardiovascular and gastrointestinal symptoms. In some coronavirus disease 2019 (COVID-19) patients, symptoms including complications can last for months or even years, which is called long COVID-19. In the future, long COVID may significantly affect patients’ quality of life and social healthcare costs as the number of recovering patients increases dramatically, further placing a huge burden on families and society. Therefore, it is very important to study the long-term health status and dynamic changes of COVID-19 patients during the recovery period.