Inclusion criteria:  Adults patient (≥18 years old) Patients admitted to Strasbourg University Hospitals for suspicion of Covid-19, between February 24 and May 31 of 2019 and 2020 Labile blood products consumed between February 24 and May 31 of 2019 and 2020 Subjects not having his opposition, after information, to the reuse of his data for the purposes of this research.  Non-inclusion criteria:  Patients who expressed opposition to participating in the study Patients under legal protection Patients under guardianship or curatorship