| [Abstract]?Objective To clarify the clinical features and epidemiological characteristics of patients infected with the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron variant in Shanghai Fangcang hospital. Methods?The clinical data of patients infected with the SARS-CoV-2 Omicron variant in Fangcang hospital of Shanghai National Exhibition and Convention Center from April 9 to May 5 in 2022 was collected. The age, sex characteristics, epidemic regional distribution and COVID-19 vaccination were analyzed statistically. Results?It was identified that 122 151 COVID-19 patients were all infected with the SARS-CoV-2 Omicron variant BA.2 or BA.2.2 subtype. The epidemiological characteristics showed that the ratio of males to females was 1.51:1, and the average age was (44.91±15.38) years. Patients aged 0-17 years, 18-30 years, 31-60 years and≥61 years accounted for 4.74%, 20.80%, 62.52% and 11.94%, respectively. Asymptomatic patients accounted for 80.80%, and mild patients accounted for 19.20%. The average length of stay of patients in Fangcang hospitals was (7.00±2.77) days. The proportion of unvaccinated patients and those who had completed 1, 2 and 3 vaccinations was 20.30%, 3.18%, 31.30% and 45.22%, respectively. Only 10.10% of patients with age ≥ 61 years had completed 3 vaccinations. Conclusions?People of all ages are generally susceptible to the SARS-CoV-2 Omicron variant. Asymptomatic patients are the main group of the SARS-CoV-2 Omicron variant epidemic, and their clinical symptoms are generally not typical. It was not easy to find the early transmission of the SARS-CoV-2 Omicron variant. Accordingly, actively strengthening nucleic acid testing is a necessary means for early detection of the epidemic. |