text: Serum levels of laminin and von Willebrand factor in COVID 19 survivors 6 months after discharge To evaluate clinical characteristics pulmonary diffusion function chest computerized tomography CT and serum lung cell damage indicators of coronavirus disease 2019 COVID 19 survivors 6 months after discharge Data of COVID 19 survivors discharged from hospital between January 21 2020 and January 11 2021 and healthy controls were collected Serum levels of surfactant D SPD the receptor for advanced glycation products RAGE laminin and von Willebrand factor vWF were measured in healthy controls and COVID 19 survivors 6 months after discharge The relationships between serum lung cell damage indicator levels and various parameters were explored Fifty two COVID 19 survivors 31 non severe and 21 severe and 30 controls were included Serum levels of laminin in COVID 19 survivors 6 months after discharge were significantly higher than those in the controls The increase was more significant in elderly and female patients Serum levels of RAGE and vWF were not statistically different from those of the controls However 6 months after discharge COVID 19 survivors with abnormal chest CT and those in the severe group had higher vWF levels COVID 19 patients had abnormal lung injury indicators 6 months after discharge The recovery time after infection is currently unknown and long term observations are required 